Company Index
- D & C Engineering - Bude
- D & C Transmissions - Greenford
- D & D (Fine Limits S M W) Ltd - Hampton
- D & D Stainless Ltd - Livingston
- D & E Metal Fabrications - Shipley
- D & E Precision Engineering - Walsall
- D & H P Blinds - Ilford
- D & M Engineering Services - Windsor
- D & P Building & Joinery - Nottingham
- D & P Joinery Manufacturers - Nottingham
- D & P Signs Ltd - Coventry
- D & R Fabrications Ltd - Winsford
- D & R Stainless Steel Products - Sheerness
- D & T Mobility Services - Caerphilly
- D & T Precision Engineering Ltd - Southampton
- D & W Metals - Stourbridge
- D + E Architectural Hardware Ltd - Peterborough
- D 2 Food Systems Ltd - Harpenden
- D A C Handling Ltd - Rotherham
- D A C Steels Ltd - Sheffield
- D A Culling - Norwich
- D A Herrmann - East Molesey
- D A Kettlewood - Selby
- D A S L Specialist Services Ltd - St Austell
- D A Safety Ltd - Nottingham
- D A T Mechanical Services - Camberley
- D A T Tinstamp Ltd - Dagenham
- D Acorn Polishing - Walsall
- D Allen Engineers - Lairg
- D and A - Manchester
- D and B - Rotherham
- D and B Gardner - Norwich
- D and D Buckle - Stowmarket
- D and D Engineering - Louth
- D and D Fabrications - Wigan
- D and D Hydraulics - Stockton on Tees
- D and D International Valves Ltd - Bury St Edmunds
- D and D Joinery - Belfast
- D and E Components Ltd - Strabane
- D and G Engineering - Weston super Mare
- D and G Fire Protection Ltd - Dumfries
- D and H Engineering Ltd - Leicester
- D and H Equipment and Service - Manchester
- D and J (Steels) Ltd - Wolverhampton
- D and J Blinds - Sutton Coldfield
- D and J Leisure Services Ltd - Hull
- D and J Ltd - Sheffield
- D and K Fabrications - Leicester
- D and K Singer - Aberdeen
- D and L Blinds - Swindon
- D and L Sheet Metal - Newcastle upon Tyne
- D and M Electroplating Ltd - Wolverhampton
- D and M Engineering Ltd - Farnham
- D and M Farm Services - Londonderry
- D and M Porter Ltd - Penrith
- D and M Powder Coatings - Batley
- D and M Towing - Sleaford
- D and M Trailer Services - Glasgow
- D and P Services - Bootle
- D and Q - Banbridge
- D and R Joinery - Durham
- D and S Engineering Services Ltd - Newport
- D and S Metalcraft - Chard
- D and S Metals - Forres
- D and S Precision Coatings - Biggleswade
- D and S Ultra-Clean Ltd - Runcorn
- D and T Mechanical Services Ltd - Sidcup
- D and T Turned Parts Ltd - Tilbury
- D Anderson - Banchory
- D B Broadcast Ltd - Ely
- D B Engineering Services - Barry
- D B Pallet Services - Grimsby
- D B R A Ltd - Bath
- D B S Midlands Ltd - Coventry
- D B Sheet Metal - Braintree
- D B T Engineering - Preston
- D Barton Associates - Colchester
- D Beacock and Son - Scunthorpe
- D Blagbrough - Telford
- D Boyd Engineering Services Ltd - Annan
- D Brash and Sons Ltd - Cardiff
- D C Associates - Manchester
- D C Blinds - Strabane
- D C Car Repairs - Oxford
- D C Daly - Newtownards
- D C Developments (Engineering) Ltd - Norwich
- D C E Joinery - Runcorn
- D C Farquhar and Partners - Glasgow
- D C H Joinery - Hassocks
- D C L Ltd - Weston super Mare
- D C S - Bedford
- D Camps - South Shields
- D Cooper - Aylesbury
- D D Blinds - London
- D D P - Wareham
- D D P Precision Engineering - Letchworth
- D D S Engineering - Buntingford
- D D S Polishing - Willenhall
- D Dobson - Dungannon
- D E G Simpson and Sons - London
- D E L Cornock - Coalville
- D E S Operations Ltd - Westhill
- D F S Fixings - Leicester
- D G B Services - Scunthorpe
- D G Engineering - Bangor
- D G Engineering Consultancy Ltd - Bridgwater
- D G P Blacksmiths - Glasgow
- D G Pugh - Ilfracombe
- D G Sheet Metal - Leeds
- D H Autos - Newcastle
- D H Engineering - Clacton on Sea
- D H Squire Consulting Engineers - Nottingham
- D Haynes Ltd - Bolton
- D I Arnold and Son - Haverfordwest
- D J Allen - Sheffield
- D J Craddock and Sons - Redditch
- D J Fellows and Sons - Pontypool
- D J Haney Fabrications - Rowley Regis
- D J M Tools and Industrial Supplies Ltd - Stratford upon Avon
- D J P Consulting Engineers - Bristol
- D J Sillito - Oakham
- D J Transmission Ltd - Falmouth
- D J Transmissions - Exeter
- D J Transmissions Ltd - Newton Abbot
- D J Watts - Driffield
- D J Williams - Wisbech
- D K Engineering - Shrewsbury
- D K S Waites Public Health Engineering Ltd - Cirencester
- D K W Engineering Ltd - Portsmouth
- D L Fabrications Ltd - Paisley
- D L K Developments Ltd - Derby
- D L Supplies - Harrow
- D M A Engineering - Exeter
- D M Battle Desgin Services - Birmingham
- D M Bulloch Associates Ltd - Whitley Bay
- D M J Engineering - Hexham
- D M Precision Ltd - Waterlooville
- D M S Stainless Ltd - Hereford
- D M Signcraft - Enfield
- D M Signs - Invergordon
- D Mccallum and Son - Stirling
- D Middleton - Batley
- D Mitchell Plant Sales Ltd - Castleford
- D Morgan Welding - Whitstable
- D N Gearboxes - Blackpool
- D N Prosser Plumbing and Heating Ltd - Worthing
- D O C - Southend on Sea
- D Oliver - Melrose
- D P Controls - Ashford
- D P D Components Ltd - Doncaster
- D P Engineering - Birkenhead
- D P L Ltd - Bromley
- D P Manufacturing - Diss
- D P R Engineering - Cannock
- D P S S Cabling Services Ltd - Uxbridge
- D P Steels - Wolverhampton
- D Palmer and Sons - Clacton on Sea
- D Platt - Leamington Spa
- D R B Engineering - Nelson
- D R C Metallurgical Ltd - Sheffield
- D R Case and Son - Brighton
- D R Hydraulics & Engineering Ltd - Washington
- D R L Welding & Mechanical Services Ltd - Witney
- D R Markey & Sons - Stockport
- D R P Bearings and Transmission Ltd - Grimsby
- D R Parr - Isles of Scilly
- D R S Cases Ltd - London
- D S & B Engineering Ltd - Barnstaple
- D S Izzard - Sandy
- D S Machining Services Ltd - Bristol
- D S Metals - Goole
- D S Partnership - London
- D S Pickford - Manchester
- D S Scrap Metals - London
- D S Sheet Metal Ltd - Poole
- D S T Group Ltd - Lancaster
- D Shaw - Larkhall
- D Stephenson Race Bike Preparation - Louth
- D Sullivan Metals - London
- D Suttle & Associates - Godstone
- D Swinley Engineering Ltd - Kirkcaldy
- D T C - Basingstoke
- D T Industrial Finishings Ltd - Leighton Buzzard
- D Thackerey - Barnsley
- D Tipton - Witney
- D Tobias Ltd - Glasgow
- D Trickett - Rochford
- D V R Fabrications - Birmingham
- D V Watkins - Leominster
- D W Engineering Solutions Ltd - Bristol
- D W Hire - Southampton
- D W Marshall and Co Ltd - Peterlee
- D W Podmore - Leek
- D W Pointer and Partners Ltd - Bromsgrove
- D W Pollock - Cleckheaton
- D W Precision Engineer - Wickford
- D W Sheet Metal Machinery - Cambridge
- D Watson and Sons - Egremont
- D Wilson - Birmingham
- D Wooldridge - Walton on Thames
- D Young Joinery Manufacturers - Durham
- D-Tech Engineering - Stockport
- D. & M. Engineering (Nuneaton) Ltd - Nuneaton
- D. & P. Metals Ltd - Witham
- D. & R. Structures Ltd - Chichester
- D.& B.Darke Ltd - Peterborough
- D.A. Cooper & Sons Ltd - Rotherham
- D.A. Plating Jigs & Light Fabrications Ltd - Smethwick
- D.A.S Engineering Services Ltd - Castleford
- D.A.T. Reproductions Ltd - Chatham
- D.B. Holdings Ltd - Doncaster
- D.B.C. Tools Ltd - Letchworth
- D.B.R. Associates Ltd - Folkestone
- D.C. Hall Ltd - Milton Keynes
- D.C. Woodhead & Partners Ltd - Pudsey
- D.D.Z. Marine Ltd - Largs
- D.G. Engineering Co. Ltd - St Helens
- D.G. Scott Ltd - Alfreton
- D.G. Steel & Son Engineering Ltd - Bury
- D.H.B. Machines (Brownhills) Ltd - Walsall
- D.H.Jones(Hardware) Ltd - Stourbridge
- D.J. Automation Engineering Ltd - Shefford
- D.J. McCarthy Associates Ltd - Huddersfield
- D.J. Sportscars International Ltd - Harlow
- D.J.Jasper (Steels) Ltd - Rowley Regis
- D.J.M. Developments Ltd - Bacup
- D.J.N. & Associates Ltd - Wimborne
- D.K. Holdings Ltd - Tonbridge
- D.L.S. Electronic Services Ltd - Northampton
- D.M. Foundries Ltd - Stroud
- D.M.D. Electronic Engineers Ltd - Enfield
- D.M.R. Engineering Services Ltd - Liverpool
- D.P.S. Fabrications Ltd - Chelmsford
- D.R. Newman (Uk) Ltd. - Birmingham
- D.R.Blinds Ltd - Alresford
- D.R.N. Engineering Ltd - Luton
- D.S.K. Engineering Services (Midlands) Ltd - Swadlincote
- D.V. Godden Engineering Ltd - West Malling
- D.W Presley Ltd - Kingsbridge
- D.W. Fabrications Ltd - Bury
- D.W. Group Ltd - Milton Keynes
- D.W. Precision Engineers Ltd - Wembley
- DA Forgie - Limavady
- DAB Engineering - Rotherham
- DAB Engineering Co Ltd - London
- Dab Handling - Glasgow
- DAB Pumps Ltd - Bishops Stortford
- Dab Systems Ltd - Ashbourne
- Dabinco Ltd - Liphook
- Dace John - Pudsey
- Dacecrown Ltd - Birmingham
- Dacmac - Slough
- Daco Engineering and Packaging UK Ltd - Westbury
- Dacol Engineering Ltd - Mansfield
- Dacol Ltd - Colchester
- Dadco Ltd - London
- Daften Die-Casting Ltd - Wadebridge
- Dagar Tools Ltd - Telford
- Daged Ltd - Bristol
- Dah Components - Aylesbury
- Daido Industrial Bearings Europe Ltd - Ilminster
- Daifuku Europe Ltd - Slough
- Daifuku Ltd - Burton on Trent
- Daihatsu Diesel (Europe) Ltd - London
- Daihatsu Entrance Systems Ltd - Bootle
- Daikin Airconditioning UK - Weybridge
- Dainese Pro Shop - Bristol
- Dairy Electrical Refrigeration Ltd - Shaftesbury
- Dairy Pipe Lines - Saffron Walden
- Dairy-Scope (Northwest) Ltd - Nantwich
- Dairy-Scope Ltd - Shrewsbury
- Dairyflow - Kilmarnock
- Daji Mohammed A - Wakefield
- Dalair Ltd - Harrow
- Dalair Ltd - Manchester
- Dalair Ltd - Wednesbury
- Dale and Co (Preston) Ltd - Preston
- Dale and Co Ancoats Ltd - Manchester
- Dale Engineering - Warrington
- Dale Fabrications (Kent) Ltd - Canterbury
- Dale Hardware Ltd - Ossett
- Dale Industrial Hose & Fittings - Rochdale
- Dale KR - Hereford
- Dale Process Engineering Ltd - Tewkesbury
- Dale Street Warehouse Ltd - Manchester
- Dale Williams - Northampton
- Daleborne Timber Products - Gravesend
- Dalen Ltd - Top-Tec Industrial - Birmingham
- Dalepark Motion Controls - Lanark
- Dales Engineering Ltd - Peterhead
- Dales Fabrications Ltd - Ilkeston
- Dales Office Supplies and Equipment Ltd. - Leeds
- Daleside Welding - Carnforth
- Dalesman Fabrications Ltd - Leeds
- Dalesway Mobility South - Weston super Mare
- Dalewood Mouldings - Sheffield
- Dalkia Energy Management Ltd - Glasgow
- Dalkia plc - Staines
- Dallas Fitted Furniture - Bristol
- Dallat Group - Coleraine
- Dallmac - Southampton
- Dalloway Gary - Stourbridge
- Dalman & Narborough Ltd - Birmingham
- Dalmar Leisure Ltd - Wimborne
- Dalon International Ltd - Harlow
- Dalta Manufacturing (Leicester) Ltd - Leicester
- Dalton Demolition UK Ltd - Airdrie
- Dalton ID Systems Ltd - Henley on Thames
- Dalton Lucerne Rare Fibres Ltd - Macclesfield
- Dalton Power Products Ltd - Grantham
- Daltons Atv's - Lampeter
- Daly Engineering - Troon
- Daly Garage Doors - East Kilbride
- Daly Heating Contractors Ltd - Coventry
- Dalzier Conservatories - Motherwell
- Damar Group Ltd - Radstock
- Dambach U K Ltd - Richmond
- Dames Non Ferrous Metal Recyclers Ltd - Derby
- Damian Sloan - Downpatrick
- Damper Technology Ltd - Ilkeston
- Damproof Engineering Services Ltd - High Peak
- Damstahl Stainless Ltd - Telford
- Damt Ltd. - Newport Pagnell
- Dan Display and Imaging Ltd - Pontyclun
- Dan Medica North Ltd - Manchester
- Dan-Doors UK Ltd - Grimsby
- Dana Corp - Stratford upon Avon
- Danalex - Stourport on Severn
- Danatrol Ltd - Loughborough
- Dando Drilling International Ltd - Littlehampton
- Dane Group plc - Newcastle upon Tyne
- Danebay Ltd - Tamworth
- Danelock Engineering Ltd - Burton on Trent
- Danetre Workshop Supplies Ltd - Daventry
- Danfast Ltd - Hull
- Danflo Engineering - Birmingham
- Danfood Technology Ltd - Hitchin
- Danfoss Ltd - Uxbridge
- Daniel Ruddy - Dungannon
- Danieli Davy Distington Ltd - Sheffield
- Daniels Fans Ltd - Llanelli
- Daniels Precision Engineering - Southall
- Daniels R J - Bedford
- Dankroy - London
- Danlett Ltd - Huddersfield
- Danley Engineering Services Ltd - Blackburn
- Danly Ltd - Halesowen
- Danmar Engineering - Edinburgh
- Dannah - Reading
- Danor Engineering Ltd - London
- Danstan Engineering Ltd - Halesowen
- Dantech Ltd - March
- Dantherm Filtration Ltd - Leeds
- Danti Engineering - Kidderminster
- Dantone Precision Engineering - Barnsley
- Danum Blinds - Doncaster
- Danvac Ltd - Shrewsbury
- Dapp Hydraulics - Walsall
- Dappat Engineering Ltd - Hull
- Dar-Val Engineering Ltd - London
- Darad Fabrications Ltd - Atherstone
- Darchem Engineering Ltd - Stockton on Tees
- Darenth Valley Building Services Ltd - Swanley
- Darfen Durafencing - Doncaster
- Darian Trading Ltd - Market Harborough
- Darley Forge - Bridlington
- Darlington Heat Treatment Ltd - Newton Aycliffe
- Darlow Precision Engineering - Worksop
- Darly Tony - Rotherham
- Darncrest Recycling & Commodities - Barking
- Darnells Ltd - Witney
- Daro Factors Ltd - London
- Daroch Motors - Birmingham
- Darpor Engineering & Associates - Winkleigh
- Darren Thompson Joinery Contractors - York
- Darron Precision Engineering - Rotherham
- Dart Valley Systems Ltd - Paignton
- Dartex Coatings Ltd - Long Eaton
- Dartford Metalcrafts Ltd - Rochester
- Dartmouth Associates Ltd - Birmingham
- Dartmouth Global Trading Co Ltd - Halesowen
- Darwell Fabrication - Kenilworth
- Darwins Holdings Ltd - Sheffield
- Daryl - Skelmersdale
- Daryl Industries Ltd - Wallasey
- Dasic Marine Ltd - Eastleigh
- Dass Manufacturing Ltd - Wallington
- Dat Images - Maldon
- Data Acquisition Design Ltd - Crawley
- Data Collection Ltd - Bognor Regis
- Data Paper Supplies - Mold
- Data Physics UK Ltd - Hailsham
- Data Power Tools Ltd - Cardiff
- Data Time Systems - Nottingham
- Data Tooling & Engineering Services Ltd - Ashford
- Data Vision (Europe) Ltd - Swindon
- DataCAM Models - London
- Datacut Engineering Ltd - Prescot
- Datagen Information Management - Glasgow
- Datapaq Ltd - Cambridge
- Dataracks - Cambridge
- DATARAX (A Division Of Databond) - Ipswich
- Datasights Ltd - Enfield
- Datastor Ltd - Sutton
- Datastor Technology Ltd - Wotton under Edge
- Datatrak Ltd - Downham Market
- Dathan Tool and Gauge Co Ltd - Huddersfield
- Dato Fabrications - Birmingham
- Datoc Engineering Ltd - Crawley
- Daton Precison Engineering - Walsall
- Datong Plc - Leeds
- Datrys Consulting Engineers Ltd - Caernarfon
- DATS - Warrington
- Datum Alloys Ltd - Kingsbridge
- Datum Electronics Ltd - East Cowes
- Datum Engine Services - Egham
- Datum Engineering - Sale
- Datum Engineering - Walsall
- Datum Engineering (UK) Ltd - Leicester
- Datum Precision Engineering - Radstock
- Datum Products Horsham Ltd - Horsham
- Datum Roadsweepers - Durham
- Datum Special Fasteners Ltd - Cannock
- Datum Tool Design - Ballynahinch
- Davall Stock Gears - Hatfield
- Davalow Ltd - Wolverhampton
- Davart Fasteners - Evesham
- Dave Bond - Nottingham
- Dave Coton (Design) - Cwmbran
- Dave Crabtree Engineering - Preston
- Dave Edwards Sheet Metal Fabrications - Stoke on Trent
- Dave Felton - Macclesfield
- Dave Kay Joinery Ltd - Richmond
- Dave Millen Joinery - Stockport
- Dave Smith - Preston
- Dave the Frame - Birmingham
- Dave The Gas - Westcliff on Sea
- Dave Walker Ltd - Cradley Heath
- Dave Wilkes Joinery - Brierley Hill
- Davenshaw Garage Equipment Ltd. - Congleton
- Daventech Ltd - Telford
- Daventry Guarding Ltd - Daventry
- Daventry Metal Products Ltd - Daventry
- Daver Steels Ltd - Sheffield
- Davey Machining Centre - Ipswich
- Davey Site Services Ltd - Milford Haven
- Davic Ltd - Sawbridgeworth
- David & J R Schofield Ltd - Oldham
- David A French - Bath
- David Alton Ltd - Matlock
- David Band Metals Ltd - Perth
- David Beard - Ormskirk
- David Bilton Engineering Ltd - North Shields
- David Blanks - Royston
- David Bowler and Sons Ltd - Southampton
- David Brown - Whitland
David Brown Engineering Ltd - Huddersfield- David Brown Hydraulics Ltd - Poole
- David C Haddrell - Hungerford
- David C T Crook - Ashton under Lyne
- David Clayton - Nottingham
- David Cochrane Ltd - Duns
- David Cookson Photography - Wigan
- David Croft - Bradford
- David Daccus and Associates - Leeds
- David Dexter Associates - London
- David Dowling Ltd - Romford
- David E Gaskin - Thame
- David Edwards & Associates Llp - Clevedon
- David Eley Associates - Ulverston
- David Engineering - Willenhall
- David Fifield - Abingdon
- David Gathercole Race Preparation - Peterborough
- David Gibson - Bangor
- David Graham - Cobham
- David Gray - Bath
- David Hagar - Swindon
- David Hardie Engineering Ltd - Dumfries
- David Harrison Handling Solutions Ltd - Ely
- David Hather - Doncaster
- David Hoare Ltd - Chichester
- David Hodkin - Matlock
- David Horn Communications Ltd - Luton
- David Hulse Engineering and Fabrication - Stoke on Trent
- David Hunt Castings Ltd - Romsey
- David J Mellor - Poole
- David J Niker - Reading
- David John Bavington - Bedford
- David John Lighting Company - Manchester
- David K Jackson - Luton
- David Kellett and Partners Ltd - Hereford
- David Kirkby Associates - Godalming
- David Kotlewski - Cupar
- David Lally - Stourbridge
- David Latham (Steel Trading) Ltd - Coleford
- David Laycock - Colne
- David M Price - Lampeter
- David Mallinson - Huddersfield
- David Martin Geary - Cardiff
- David Matthews Ltd - Swansea
- David Mccullough and Co - Belfast
- David Mcnulty - Leicester
- David Mellor Design Ltd - Sheffield
- David Olive - Gloucester
- David Paterson Ltd - Elgin
- David Pennills - Market Drayton
- David Perkins Site Welding - Burton on Trent
- David R Milward - Macclesfield
- David Reekie and Sons Ltd - Renfrew
- David Richards Engineering Ltd - Southampton
- David Robert Cox - Fareham
- David Roberts Engineering Ltd - Caerphilly
- David Roche Geoconsulting Ltd - Exeter
- David S Anderson - St Neots
- David Scanlan - Melksham
- David T Hedges - Banbury
- David Thorn and Sons Ltd - Leigh on Sea
- David W Jones - Treharris
- David W Watt - Coniston
- David Walker Engineering Services - Ramsgate
- David Walter - Leicester
- David Warsop and Co - Barnsley
- David Webster Ltd - Harlow
- David Wilkinson Ltd - Doncaster
- David William Sheldon - Sheffield
- David Williams (Llandudno) Ltd - Llandudno
- David Wilson and Associates - Saltburn by the Sea
- David Wolfenden & Co Ltd - Newbury
- Davids of Ripon Ltd - Ripon
- Davidson Fabrications - Mold
- Davidson Williams (Merseyside) Ltd - Birkenhead
- Davies - Telford
- Davies & Nelson Engineering Co Ltd - Tewkesbury
- Davies Bros - Birmingham
- Davies D P - Shrewsbury
- Davies Environmental Uk Ltd - Coventry
- Davies Gwyln - Uttoxeter
- Davies John - Birmingham
- Davies John Douglas - Truro
- Davies Joinery Products - Birmingham
- Davies Kevin Cookers & Boilers - Llandysul
- Davies Phillip - Pontypool
- Davies Precision Grinding Ltd - Birmingham
- Davies S - Wigan
- Davies Samuel John - Slough
- Davies Scrap Metals - Tredegar
- Davies Springs Ltd - Redditch
- Davies Woven Wire Ltd - Cradley Heath
- Davinci Creative Textiles - Walsall
- Davinson & Mason Ltd - Leicester
- Davis Access Platforms Ltd - Bristol
- Davis and Snell - Barnstaple
- Davis Cash and Co Ltd - Enfield
- Davis Derby Ltd - Derby
- Davis Engineering - Maryport
- Davis Ornamental Ironwork - St Helens
- Davis Paul - Bilston
- Davis Pneumatic Systems Ltd - Plymouth
- Davis Scientific Treatments Ltd - Tewkesbury
- Davis Sheet Metal & Fabrications - Southampton
- Davis WH Ltd - Mansfield
- Davison & Pack Ltd - Rushden
- Davison Forklift Ltd - Wolverhampton
- Davison Tyne Metal Ltd - Hexham
- Davjon Engineering Services - Wolverhampton
- Davlec Ltd - Welshpool
- Davley Fabrications - Halifax
- Davpal Pallets - Daventry
- Davrek Engineering - Eastbourne
- Davromatic Precision Ltd - Rugby
- Davron - Stockport
- Davturn Repitition Turn Parts - Bromsgrove
- Davy Co Ltd - Gateshead
- Davy Engineering Ltd - Solihull
- DavyMarkham - Sheffield
- Dawes Cycles Ltd - Birmingham
- Dawley Metals - Kingswinford
- Dawmed International Ltd - Rotherham
- Dawn Engineering - Cambridge
- Dawn Fire Ltd - High Wycombe
- Dawn Retail Systems Ltd - Airdrie
- Daws Blinds - Swindon
- Dawson & Son Ltd - Leeds
- Dawson Bowman Ltd - Glasgow
- Dawson Construction Plant Ltd - Milton Keynes
- Dawson Downie Lamont Ltd - Glenrothes
- Dawson M M P Ltd - Barnsley
- Dawson Precision Components Ltd - Oldham
- Dawson Shanahan Ltd - Potters Bar
- Dawson Tom Metals - Bradford
- Dawsonrentals Portable Cold Storage Ltd - Sutton in Ashfield
- Dawton Engineers Ltd - Sheffield
- Day & Zimmermann Ltd - Stockport
- Day A J - Staines
- Day C - Luton
- Day John Engineering - Newbury
- Day Recycling Ltd - Northampton
- Day Signs - Totnes
- Daybrook Interiors - Kingston upon Thames
- Daylight Management Systems Ltd - Bradford
- Daylove Paul M - York
- Daynes Andrew - Lincoln
- Dayton Engineering Company Ltd - Coventry
- Dayton Granger International - High Wycombe
- Dayton Progress Ltd - Kenilworth
- DB Crane Ltd - Dudley
- DB Engineering Ltd - Newport (Gwent)
- DB Engineering Services UK Ltd - Ashton under Lyne
- DB Projects Ltd - Grangemouth
- DB Sheetmetals Ltd - Haverhill
- DBS Brand Factors - St Helens
- DBT-GB - Motherwell
- DC Auto Engineering - Ballymena
- DC Dingwall - Kingussie
- DC Engineering - Newport (IOW)
- DC Plastics and Co - Birmingham
- DC Welding Fabrication - Ledbury
- DC White and Partners Ltd - Hook
- DC-Tek Ltd - Arlesey
- DCA Design International - Warwick
- DCE Holne (R and D) Ltd - Kingsbridge
- DCE Holne Ltd - Buckfastleigh
- Dcf Associates Ltd - Gloucester
- DCM Drillquip Ltd - Nuneaton
- Dcr Engineering Co Ltd - Newton Aycliffe
- Dcv Precision Ltd - Farnham
- DD Engineering - Kings Lynn
- Dd Fabrications - Carlisle
- DD Subsea - Insch
- DDC Dolphin Ltd - Poole
- DDC Engineering - Dalkeith
- DDP Tools Ltd - Redditch
- De Broise - Somerton
- De Burgh & Associates Ltd - Swadlincote
- DE Engineering Services - Aberdeen
- De Flow Ltd - Woodbridge
- De Graaff & Partners - Aylesford
- De Graaff A - Woking
- De Havilland Support Ltd - Cambridge
- De Lange C - Lincoln
- De Looze Julian - Burnley
- De Met Ltd - Kingswinford
- De Smet Rosedowns Ltd - Hull
- De Soutter Medical Ltd - Berkhamsted
- De Tech - Darlington
- De-Icers (M.H.G.) Ltd - Cheltenham
- De-Signs - Mansfield
- De-Soutter Medical - Berkhamsted
- De-Sta-Co (Destaco) Cpi UK - Wolverhampton
- Deakin & Francis Ltd - Birmingham
- Deakin Walton Ltd - Harrogate
- Deakin Walton Ltd - Haslemere
- Dealcompac Ltd - Cardiff
- Dealercast Ltd - Manchester
- Dealersense Ltd - Chorley
- Deallow Ltd - Eastbourne
- Dean Choice Ltd - Stockport
- Dean Engineering - Buckingham
- Dean F & Son - Accrington
- Dean Precision Engineering - Worksop
- Dean Smith and Grace Ltd - Keighley
- Deane & Amos Aluminium Systems Ltd - Northampton
- Deane Joinery - Taunton
- Deans Systems Ltd - Beverley
- Deansfield Metal Finishing Co Ltd - Wolverhampton
- Dearle and Henderson Ltd - London
- Dearson Tools Ltd - Birmingham
- Deason Joinery Ltd - Leicester
- Deatons Metal Centre - Chesterfield
- Deba Cooling Towers and Engineering Co Ltd - Dartford
- Debonair Curtains and Blinds - Bridgnorth
- Deburring Centre Ltd - Poole
- Deburring Services Ltd - Cheltenham
- Debut Doors - Kettering
- Dec Realisations Ltd - Willenhall
- Deca Materials Handling Ltd - Wantage
- Dechmont - Broxburn
- Deci-Coin Automats Ltd - St Helens
- Declan Stewart - Banbridge
- Decma Ltd - Dudley
- Decor Blindmakers - Sheffield
- Decor Blinds - Birmingham
- Decor Blinds - St Helens
- Decor Interiors International Ltd - Watford
- Decor Iron - Wednesbury
- Decora - Belfast
- Decorative Art Metals Ltd - London
- Decorflair Group Ltd - Burnley
- Decorflair Ltd - Manchester
- Decorshade - Manchester
- Decra Roof Systems Ltd - Crawley
- Dectel Security Ltd - Basildon
- DED Ltd - Romney Marsh
- Dee Boiler Maintenance Co - Neston
- DEE Services - Newtown
- Dee's Bespoke Joinery - Barton upon Humber
- Dee-Organ - Renfrew
- Deecon Engineering Ltd - Bilston
- Deedmore Engineering - Coventry
- Deelee Engineering Services Ltd - Swadlincote
- Deep Blue Eng Solutions Ltd - Aberdeen
- Deep Sea Seals Ltd - Havant
- Deepack Plastics Ltd - Deeside
- Deepdale Engineering Co Ltd - Dudley
- Deepdale Studio - Barton upon Humber
- Deepsea Engineering & Management Ltd - Epsom
- Deescan - Wrexham
- Deeside Engineering Services - Wrexham
- Deeside Generator Rewinds (North Wales) Ltd - Deeside
- Deeside Marine - Dumfries
- Deeter Electronics Ltd - High Wycombe
- Deeter Engineering Services Ltd - High Wycombe
- Deeter Weighing Systems - High Wycombe
- Defabs Engineering Systems Ltd - Derby
- Defiant Weighing Ltd - Sevenoaks
- Definitive Joinery Ltd - Pontypool
- Defuma - Huntingdon
- Deif (UK) Ltd - Stockport
- Deighton Engineers (Halifax) - Halifax
- Deighton Manufacturing UK Ltd - Bradford
- Dekomte de Temple Kompensator -Technik (UK) Ltd - Moreton in Marsh
- Dekton Components (Leicester) Ltd - Leicester
- Del Engineering (UK) Ltd - Ammanford
- DEL Industrial Fastenings Ltd - Fleet
- Delap and Waller Ltd - Londonderry
- Delapena Honing Equipment Ltd - Cheltenham
- Delaval Ltd - Cardiff
- Delfield Precision Engineering Co Ltd - Ruislip
- Delite Blinds - Hayes
- Delkor (UK) Ltd - Radstock
- Dell Engineering Ltd - Andover
- Delmatic Ltd - London
- Delmer Precision Ltd - Romford
- Delmore Ltd - Bury St Edmunds
- Deloro Stellite - Swindon
- Delph Control Systems Ltd - Brierley Hill
- Delphi Diesel Systems - Sudbury
- Delpro Ltd - Glossop
- Delrac ACS Ltd - Worcester Park
- Delron Services Ltd - Aylesford
- Delstar Engineering Ltd - Haverhill
- Delstron Systems - Burton on Trent
- Delta Aircraft Services Ltd - Ilkeston
- Delta Balustrades - Bristol
- Delta Balustrades - Sandbach
- Delta Business Equipment - Stockport
- Delta Caravans Ltd - Hull
- Delta Catalytic (UK) Ltd - Immingham
- Delta Design Systems Ltd - Clacton on Sea
- Delta Display Design & Shopfitting - Stansted
- Delta Dynamics Ltd - Ellesmere Port
- Delta Engineering - Castleford
- Delta Engineering (G B) Ltd - Wolverhampton
- Delta Engineering Aviation Ltd - Cirencester
- Delta Fabrications - Huntingdon
- Delta Fire Ltd - Norwich
- Delta Fire Systems Ltd - Dudley
- Delta Fluid Products Ltd - St Helens
- Delta GBN Ltd - Halesowen
- Delta Line Europe UK Ltd - Whitstable
- Delta Pacific Manufacturing Ltd - Ely
- Delta Precision Engineering - Seaham
- Delta Precision Engineering Ltd - Poole
- Delta Services Ltd - Braintree
- Delta Systems (Wisbech) Ltd - Wisbech
- Delta Thermal Systems - Liverpool
- Delta Tooling - Horsham
- Delta Vacuum Precision Ltd - Manchester
- Deltacastle Confidential Recycling Services Ltd - London
- Deltacrest 2000 Ltd - Leamington Spa
- Deltair Airmotive Ltd - Waterlooville
- Deltamech Services Ltd - Eye
- Deltawaite Ltd - Workington
- Deltec Industries Ltd - Poulton le Fylde
- Deltic Engineering - Luton
- Delton Engineering - Ongar
- Delton Engineering Services - Swansea
- Delyn Metals - Holywell
- Demag Cranes and Components Ltd - Banbury
- Demand Technology International Ltd - Fleet
- Demax - Swaffham
- Demkel Ltd - Rotherham
- Demma Controls Ltd - Birmingham
- Demon Bikes - Newcastle upon Tyne
- Demon International Ltd - Ivybridge
- Denaco (U K) Ltd - Derby
- Denby & Sharp Ltd - Preston
- Denca Controls - Widnes
- Dench Engineering - Sheffield
- Denco Engineering - Slough
- Denco Ltd - Hereford
- Denco Ltd - Runcorn
- Denebank Precision Engineering (UK) Ltd - Sunbury on Thames
- Denford Projects Ltd - Brighouse
- Denholm Rees & O'Donnell Ltd - Liverpool
- Denholt Industrial Fabrications - Halifax
- Denis Ferranti Group - Bangor
- Denis Wilson Partnership - Manchester
- Denison Hydraulics U.K. Ltd - Burgess Hill
- Denley Engineering - Coventry
- Denley Hydraulics Ltd - Heckmondwike
- Denman Instrumentation Ltd - Hessle
- Denmay Steel & Hire Co - Brighton
- Denmic Engineering - Wakefield
- Denne Metal Finishing Ltd - Horsham
- Denner-Kelford Grinding Ltd - Birmingham
- Dennis Baldwin & Sons Ltd - Keighley
- Dennis Derek - Llanelli
- Dennis Eagle Group Ltd - Warwick
- Dennis Hawkins Welding - Newport Pagnell
- Dennis Heath - Twickenham
- Dennis Lee & Company Ltd - Fakenham
- Dennis T Gale - Hull
- Dennis W Green - Bourne
- Denny Engineering Ltd - Norwich
- Denroy Precision Engineers Ltd - Hyde
- Dens Metals Ltd - Dundee
- Denso Manufacturing Uk Ltd. - Telford
- Denso Sales UK Ltd - Coventry
- Dent Instrumentation Ltd - Colne
- Dent Steel Services (Yorkshire) Ltd - Bradford
- Denton Blinds - Burton on Trent
- Denton Blinds - Manchester
- Denton Containers 2000 Ltd - Romney Marsh
- Denton Pumps (Kent) Ltd - Tonbridge
- Denvic Ltd - Kidderminster
- Denward Manufacturing - Chelmsford
- Denwire Ltd - Dudley
- Denys Halsall Associates Ltd - Sidmouth
- Dep Pipes Ltd - Maidstone
- DePe Gear Company Ltd - Stoke on Trent
- Dependable Springs & Pressings Ltd - Wolverhampton
- Deprag Ltd - Whitchurch
- Deptford Sheetmetal - London
- Derbirch Fabrications Ltd - Grimsby
- Derby and Co Ltd - London
- Derby Bearings Ltd - Derby
- Derby Care & Mobility - Derby
- Derby Mobility Services Ltd - Ripley
- Derby Racing Services Ltd - Derby
- Derbyshire and Sons Ltd - Widnes
- Derbyshire Castings Ltd - Altrincham
- Derbyshire Industrial Sales Ltd - Chesterfield
- Derbyshire Packaging Systems Ltd - Chesterfield
- Derek Anthony Ltd - Oldham
- Derek Chinn - Bedford
- Derek Connor - Enniskillen
- Derek Durant Associates - East Grinstead
- Derek Gammons Engineering Associates Ltd - Oldham
- Derek George Knowles - Manchester
- Derek H Bell Smith and Stewart - Newcastle upon Tyne
- Derek Hawkins - Northampton
- Derek James Brown - St Albans
- Derek Lane and Co Ltd - Exeter
- Derek Miller Scrap Metals - Kings Lynn
- Derek Parkinson - Grimsby
- Derek Parnaby Cyclones International Ltd - Ferryhill
- Derek Raphael - London
- Derek Scarboro Engineering - Boston
- Derek Senior - Hebden Bridge
- Derek Taylor Engineering Ltd - Manningtree
- Deri Jones and Associates Ltd - Machynlleth
- Derian Engineering Ltd - Barrow in Furness
- Deritend Aviation Windings - Luton
- Deritend Electro-Mechanical Services Ltd - Pontypridd
- Deritent Induction Services - Walsall
- Derlwyn Drums - Llandysul
- Dermaco Ltd - Dunstable
- Dernaseer Engineering Ltd - Dungannon
- Dero Fabrication Ltd - Worcester
- Derrick Stephen - Tredegar
- Derry Paper & Book Conservation - Nottingham
- Derry Precision Tools - Londonderry
- Derwen Tooling Ltd - Pontypridd
- Derwent Castings Ltd - Matlock
- Derwent Design Engineering - Ripley
- Derwent Engineering - Sheffield
- Derwentside Precision Gears Ltd - Stanley
- Derwood & Abel Ltd - Rainham
- Des Gosling Mobility Ltd - Derby
- Des Group Ltd - Brentford
- Desa Systems Ltd - Huddersfield
- Desai & Desai Ltd - Hounslow
- Descant Ltd - Bathgate
- Descon Ltd - Leeds
- Design 2 Print (Llandudno) Ltd - Llandudno
- Design A Blind - Leicester
- Design and Engineering - Ulverston
- Design and Manufacture Ltd - Merthyr Tydfil
- Design Brief 7 - Milton Keynes
- Design Engineering Services (Wolverhampton) Ltd - Wolverhampton
- Design Enterprises - Stevenston
- Design Initiative Ltd - Lewes
- Design Installation Service Ltd - Loughborough
- Design International Ltd - Ruthin
- Design IV - Hereford
- Design Joinery - Benfleet
- Design Paradigm Ltd - Huddersfield
- Design Rationale Ltd - Hatfield
- Design Reality Ltd - Rhyl
- Design Signs - Watford
- Design Synergy Ltd - Kettering
- Design Tech Ideas - Newquay
Design Technology International Ltd - Ipswich- Design-A-Sign - Halifax
- Designation Ltd - Peterborough
- Designbrook Ltd - Wokingham
- Designcode Ltd - Ellesmere Port
- Designer Blinds - New Tredegar
- Designer Blinds & Interiors Ltd - Nantwich
- Designer Gates - Rainham
- Designer Ironsmith Of Arundel - Arundel
- Designer Woodwork Service - Sheffield
- Designplan Lighting Ltd - Sutton
- Designs and Signs - Chelmsford
- Designs For Blinds - Sheffield
- Designs In Aluminium - Peacehaven
- Designs on Engineering - Chelmsford
- DesignTech Solutions Ltd - Gloucester
- Desire2display Ltd - Stoke on Trent
- Deskjockeys - Stourbridge
- Desktop Engineering Ltd - Witney
- Desman Engineering Ltd - Mansfield
- Desmi Ltd - Newcastle under Lyme
- Dessian Products Ltd - Belfast
- Dessian Scotland - Bellshill
- Deswood Precision Ltd - Dorking
- Detail Sheet Metal (Kent) Ltd - Dartford
- Detecto Scale - Bury St Edmunds
- Detector Technologies Ltd - Alton
- Dethleffs - Cleethorpes
- Detroit Solar - Nottingham
- Deublin Ltd - Andover
- Deutz UK Ltd - London
- Deva Forge - Chester
- Deva Tap Co Ltd - Leigh
- Devaco International Ltd - Chester
- Devanon Plastics Ltd - Ely
- Devco Engineering - Bradford
- Development & Technology Ltd - Melton Mowbray
- Develtek Ltd - Aberdeen
- Devereux Robert B - Watford
- Deveron Blinds - Turriff
- Deville & Lear Ltd - Ashbourne
- Devin Consulting Ltd - North Shields
- Devizes Reclamation Co Ltd - Devizes
- Devizes Steel Supplies - Melksham
- Devol Engineering Ltd - Greenock
- Devon & Somerset Engineering Co Ltd - Minehead
- Devon Metalcrafts Ltd - Exmouth
- Devon Motor Caravans Ltd - Ferryhill
- Devon Pine Oak - Plymouth
- Devon Signs - Exmouth
- Devon Spirals - Paignton
- Devonport Royal Dockyard Pension Trustees Ltd - Plymouth
- Devonshire Blinds Ltd - Thornton Cleveleys
- DEW Electronic Engineering Ltd - Chigwell
- Dewar Mobility - Bridlington
- Dewhurst Dent Textiles - Manchester
- Dewhurst Engineering Ltd - Blackburn
- Dewhurst Plc - Hounslow
- Dewitt David Terence - Halstead
- Dexion Comino Ltd - Bromsgrove
- Dexter Magnetic Technologies Europe Ltd - Slough
- DFL Material Handling Ltd - Darlington
- DG Controls Ltd - Swadlincote
- DG Health and Mobility - Worcester
- DG Hedley - Rhyl
- DG Springs Ltd - Leicester
- Dg Warping Ltd - Nottingham
- DGR Engineering - Wolverhampton
- DGS Abrasives Division - Portsmouth
- DGS Abrasives Ltd - Wolverhampton
- DGS Property Maintenance Ltd - Liverpool
- DH Stainless Ltd - Accrington
- Dhanjal S K - Birmingham
- DHD Engineering Services Ltd - Wrexham
- DHF Engineering Ltd - Melksham
- Dhf Ltd - Dewsbury
- Dhl Bathroom Supplies Ltd - Bristol
- Dhp Engineers Ltd - Rotherham
- DHR Sheet Metal Fabrication - Huddersfield
- DHS Tool Supply Co Ltd - Plymouth
- Di-Spark Ltd - Waterlooville
- Diagenics Ltd - Milton Keynes
- Diageo Abercrombie - Alloa
- Dial Patterns Ltd - Ashford
- Dial Time Systems Ltd - Wigan
- Dialight Plc - Enfield
- Diamedica - Barnstaple
- Diametric Metal Fabrications Ltd - Rugeley
- Diamond - Birkenhead
- Diamond Anchor Co Ltd - Chesterfield
- Diamond Autos - Glasgow
- Diamond Blinds - Maesteg
- Diamond Blinds Ltd - Bedford
- Diamond Compressor Services Ltd - Derby
- Diamond Conservatories & Windows (Kettering) Ltd - Kettering
- Diamond Corrugated Cases Ltd - Londonderry
- Diamond Diesels (Uk) Ltd - Leeds
- Diamond Engineering and Drilling Services Ltd - Bathgate
- Diamond Engineering Ltd - Saffron Walden
- Diamond Gleam - Blackpool
- Diamond Ground Products Ltd - Huntingdon
- Diamond Mechanical & Electrical Engineering Services Ltd - Wickford
- Diamond Paul - Milton Keynes
- Diamond Power Service - Bolton
- Diamond Power Specialty Ltd - Dumbarton
- Diamond Precision Engineering Wirral Ltd - Birkenhead
- Diamond Products International Ltd - Aberdeen
- Diamond Scientific Ltd - Darlington
- Diamond Windows - Maldon
- Diamond Wood Partnership - Bury
- Diamond Wood Partnership - Leicester
- Diamro Engineering and Fabrications Co - Sheffield
- Diaploy Ltd - Ilkeston
- DIAS Workholding Ltd - Inverurie
- Dibone Engineering Ltd - Stroud
- Dicam Technology Ltd - Saxmundham
- Dick and Dodman Partnership - Oxford
- Dick Lane Metals - Bradford
- Dick Trader - Leeds
- Dick Webb - Wakefield
- Dicker Precision Components Ltd - Hailsham
- Dickerman Overseas Contracting Company Ltd - Kettering
- Dickinson and Battley - Hitchin
- Dicol Precision Engineering UK Ltd - Clacton on Sea
- Dicom Ltd - Alfreton
- Dicom Technologies Ltd - Basingstoke
- Dicon Safety Products (Europe) Ltd - Gloucester
- Dictator Engineering Ltd - Maidstone
- Didafab - Brighton
- Didsbury Engineering Company Ltd - Wilmslow
- Dieline/Rykel - Wirral
- Dielise - Middlesbrough
- Diemasters Ltd - Greenford
- Diemax Precision Engineering Ltd - Dundee
- Diemould Service Co Ltd - High Wycombe
- Diesel Controls Ltd - Carluke
- Diesel Marine International Ltd - North Shields
- Diesel Quads - Amlwch
- Diesel Recon UK Ltd - Cumbernauld
- Dietiker Metals Ltd - Manchester
- Diffusion Environmental Systems - Molesey
- DIG Holdings Ltd - Aldeburgh
- Digby Alan W - Wellingborough
- Digicast Ltd - Leicester
- DiGiCo UK Ltd - Chessington
- Digico UK Ltd - Glenrothes
- Digital Contracts Management Ltd - Oldham
- Digital Documents Ltd - West Malling
- Digital Echo Ltd - St Albans
- Digital Lift Controls Ltd - Daventry
- Digital Metal Ltd - Pontefract
- Digital Office Copiers Ltd - Rayleigh
- Digital Office Supplies Ltd - Southend on Sea
- Digital Vision Technologies Ltd - Northwich
- Digwoods Ltd - Bridgnorth
- Dihurst Holdings Ltd - Exmouth
- Dilcon Ltd - Havant
- Dimar Ltd Aluminium Extrusions - Farnham
- Dimension Four - Northampton
- Dimension Precision Engineering - Sutton in Ashfield
- Dimill Engineering Ltd - Studley
- Dimuken (G.B.) Ltd - Peterborough
- Dingle Matt - Ottery St Mary
- Dinkie Heel plc - Bristol
- Diomed Ltd - Cambridge
- Direct Access Supplies Ltd - Ely
- Direct Blinds (U K) Ltd - Peterborough
- Direct Boiler Services - London
- Direct Chairframes - Leeds
- Direct Digital Ltd - London
- Direct Engineering Ltd - Rushden
- Direct Engineering Scotland Ltd - Paisley
- Direct Fabrications (Banbury) Ltd - Banbury
- Direct Gaskets Ltd - Hull
- Direct Hydraulics Ltd - Bury
- Direct Lift Co - Colchester
- Direct Lift Services Ltd - London
- Direct Medical Plastics Ltd - Leamington Spa
- Direct Metal Services Ltd - Crayford
- Direct Mobility Hire - London
- Direct Pallet - Bolton
- Direct Quality Conservatories - Swansea
- Direct Steel Stockholders Ltd - Colchester
- Directives Advisory Services Ltd - Wigan
- Directoright - Worcester
- Direkt Engineering Services - Newcastle upon Tyne
- Dirt Driver Ltd - Highbridge
- Dirtbikestore Uk Ltd - Bridgwater
- DIS (Stoke-On-Trent) Ltd - Stoke on Trent
- Dis East Anglia Ltd - Halstead
- DISA Industries A/S (UK Branch) - Halesowen
- Disability Centre - Limavady
- Disability Equipment Services - Warrington
- Disco Drives (King's Lynn) Ltd - Kings Lynn
- Discount Desk Centre Ltd - Bonnybridge
- Discovery Design and Management Services Ltd - Dundee
- Dispak (Holdings) Ltd - Melksham
- Dispak (Midlands) Ltd - Whitchurch
- Dispec Anodizing Ltd - Barnoldswick
Dispensing Liquid Ltd - Huntingdon- Display Lighting Ltd - Altrincham
- Display Refrigeration Hire Ltd - Gloucester
- Disposables & Catering Supplies - Chelmsford
- Diss Fasteners Ltd - Diss
- Ditch Witch UK - Swansea
- Diva Metalwork Ltd - Faversham
- Divers Warehouse Ltd - Bradford
- Diverse - Barnsley
- Diversia Ltd - Ross on Wye
- Dixi Ltd - Coventry
- Dixon - Stocksfield
- Dixon Bate Ltd - Deeside
- Dixon Carriage & Equine Services Ltd - Cambridge
- Dixon Engineering - Milton Keynes
- Dixon Group Europe Ltd - Preston
- Dixon Hall & Company Ltd - Batley
- Dixon Hurst Partnership - Hove
- Dixon Raymond - Tipton
- Dixon WG and Sons - Londonderry
- Dixons Blinds - Lewes
- Dixons Surgical Instruments Ltd - Wickford
- Diy Trailers - Llandysul
- Diytools Com - Watford
- DJ Chemical - Keighley
- DJ Engineering - Thame
- DJ Installations and Fabrications Ltd - Newcastle upon Tyne
- DJ Price - Shrewsbury
- DJ Profile and Grinding Co Ltd - Stockport
- DJ Tym (Engineering) - Rainham
- DJ Williams and Son - Caernarfon
- DJF Metal Finishing - Birmingham
- DJH Engineering Ltd - Consett
- DJJ Precision Engineering Co Ltd - Newport (Gwent)
- DJM - Leeds
- DJM Precision Engineering - Towcester
- DJN - Washington
- Djokaran Ahmad - Wembley
- DJS Power - Coventry
- DJV Insulations - Belfast
- DK Jones Ltd - Alcester
- DK Jones Ltd - Middlesbrough
- DK Precision - Bideford
- DKE Ltd - Waterlooville
- DKM Sheet Metal Co Ltd - Stonehouse
- DKP Engineering Services - Pontypool
- DL Communications - Dalkeith
- DLD Engineering - Clacton on Sea
- DLI Engineering Ltd - Trimdon Station
- DLP Engineering - Leicester
- DM Dust Control and Metal Fabrications - Lisburn
- DM Engineering - Bolton
- Dm Message Ltd - Blyth
- DMC Business Machines plc - Croydon
- DMD 2000 - Aberdeen
- DMD Transmissions - Wolverhampton
- DMDesign - Brighton
- Dmdl Ltd - Telford
- DMG World Media Ltd - Redhill
- DMH Blacksmiths Ltd - Inverness
- DMM Engineering Ltd - Caernarfon
- DMN UK Ltd - Calne
- DMOptics - Weston super Mare
- DMP - Glasgow
- DMP Group - Slough
- DMR Engineering Ltd - Livingston
- DMS Joinery - Grimsby
- DMS Laser Profiles Ltd - Maidenhead
- DMS Ltd - Nottingham
- Dn Fabrications - Norwich
- DNA Engineering - London
- DNC Machine Tools Ltd - Swindon
- DNS Engineering Services - Bournemouth
- Dns Windows Ltd - Nottingham
- Do Fit Blinds - Cardiff
- Dobbin Refrigeration - Lisburn
- Dobbs Blind Makers Ltd - Lincoln
- Doble PowerTest - Guildford
- Dobson & Beaumont Ltd - Blackburn
- Dobson Engineering - Salisbury
- Dobson Robin - Sheffield
- Dobson Tristan - Chelmsford
- Doby Verrolec (T/u Doby Cleats Ltd) - Stanley
- Doc's Away Ltd - High Peak
- Dockgrange Ltd - Barking
- Docscan Ltd - Bristol