Company Index
- S 1 Systems - Stroud
- S and G Cables Co Ltd - Durham
- S and H Systems Ltd - Cannock
- S and J Juniper and Co - Harlow
- S and J Precision Ltd - Leicester
- S and M Services - Braintree
- S and S Electronics - Sheffield
- S and S Systems Ltd - Sheffield
- S Carden Systems Ltd - Leigh
- S Lilley and Son Ltd - Birmingham
- S M P Electronics - Woking
- S2S Electronics Ltd - Huddersfield
- Sabre Advanced Microelectronics - Guildford
- Sabre Controls Ltd - Bexhill on Sea
- Sabrebanner Ltd - Bradford
- SAC (Electronic Products) Ltd - Derby
- Saeco Ltd - Watford
- Saetech Ltd - Hungerford
- Safe and Sound - Ashton in Makerfield
- Safe and Sound Ltd - Mansfield
- Safe and Sound Management Consultants Ltd - Bletchley
- Safe and Sound Security Systems - Manchester
- Safe Communications Ltd - Brighton
- Safe-Link Services Ltd - London
- Safel - Thirsk
- Safeline Ltd - Salford
- Safetech - Sunderland
- Safetell Ltd - Dartford
- Safetest - Bournemouth
- Safety at Work Services - Maidstone
- Safety Lighting Systems Ltd - Chelmsford
- Safety Plus (UK) Ltd - Nottingham
- Safety Power Group Ltd - Farnborough
- Saffron - Hove
- Saffron Electronics Ltd - Stafford
- SAFT Ltd - Harlow
- SAFT Ltd - South Shields
- Saft Power Systems Ltd - Ilford
- Saftronics Ltd - Leeds
- Sagemaster Cases Ltd - Tunbridge Wells
Saia - Burgess Gateshead Ltd (A Johnson Electric Company) - Gateshead- Sailes Marketing Ltd - Pershore
- Saint-Gobain Quartz PLC - Wallsend
- SAL Pharma (Division of Ascot Autoclaves Ltd) - Wokingham
- Salem Automation Ltd - Rotherham
- Salient Electronics - Grimsby
- Salton Europe Ltd - Manchester
- Samms Electronics - Sandy
- Samsons (Transformers) Ltd - Twickenham
- Samsung (UK) Ltd - Brentford
- Samsung Electronics (UK) Ltd - Chertsey
- Samtec Europe Ltd - Cumbernauld
- Samtech Ltd - Glasgow
- Samuel Taylor Ltd - Redditch
- Samwha Electric UK - Richmond
- Sanders Electronics Ltd - Tring
- Sanderson - Coventry
- Sandford Electrical Services Ltd - Slough
- Sandpiper Aerial Technology Ltd - Aberdare
- Sangamo Ltd - Port Glasgow
- Sanken Power Systems (UK) Ltd - Bridgend
- Santec Europe Ltd - Oxford
- Santon SwitchGear Ltd - Newport (Gwent)
- Santronics - Workington
- Sanyo Component Europe GmBh - Walton on Thames
- Sanyo Component Europe GmbH - Watford
- Sanyo Industries (UK) Ltd - Lowestoft
- SAPA Profiles Ltd - Alfreton
- Sapphire Research and Electronics Ltd - Ferndale
- Sarabec Ltd - Middlesbrough
- Saracen Chemicals Ltd - Wallington
- Sarbin Solutions Ltd - Caldicot
- Sarel - Swindon
- Sargent Electrical Services Ltd - Beverley
- Sarian Systems - Ilkley
- Saros Technology Ltd - Wallingford
- Sarsen Technology Ltd - Marlborough
- Sascal Displays Ltd - Hayes
- Sato UK Ltd - Harwich
Saturn Solutions Ltd - Folkestone- Saul Research - Towcester
- Saunders Electronics Ltd - Hinckley
- Sauter Automation Ltd - Basingstoke
- Saverstore.com - Luton
- Saville Audio Visual - York
- Saxon Embedded Solutions Ltd - Bradford
- Saygrove (Systems and Technology) Ltd - Mold
- SBK Computers Ltd - Chesterfield
- SCA Packaging Industrial - Darlington
- SCA Packaging Ltd - Aylesford
- Scalemart UK - Portsmouth
- Scame UK - Ashington
- Scan Alarms and Security Systems (UK) Ltd - Newtownabbey
- Scan Logic Ltd - Aldridge
- Scan-Optics Ltd - Watford
- Scanivalve Corporation - Bath
- Scanlite Visual Communications Ltd - Blackpool
- Scanna MSC Ltd - London
- Scanning Resources Ltd - Harpenden
- Scantron Industrial Products Ltd - Taunton
- Scaringbirds com Ltd - Ludlow
- SCH Services Ltd - Barnsley
- Schaffner Ltd - Wokingham
- Schenck - Worcester
- Schenck Ltd - Warwick
- Schleising Consultancy Ltd - Thame
- Schloetter Co Ltd - Pershore
- Schmitt Europe Ltd - Coventry
- Schneider Electric Ltd - Chippenham
- Schneider Electric Ltd - Coventry
- Schott Industrial Glass Ltd - Newton Aycliffe
- Schott UK Ltd - Stafford
- Schrack Components Ltd - Stanmore
Schroff (UK) Ltd - Hemel Hempstead- Schunk UK Ltd - Pudsey
- Schurter Ltd - Bognor Regis
- Sci-Lab Analytical Ltd - Chester
- Scientific (Atlanta Europe) Ltd - Reading
- Scientific Computers Ltd - Crawley
- Scientific Electro Systems Ltd - Rochford
- Scientific Glass Blowing Co Ltd - Oldham
- Scientific Management Associates UK Ltd - Andover
- Scientific Services Derby Ltd - Derby
- Scientific Vacuum Systems Ltd - Wokingham
- Scientific Wire Co - London
- Scientifica and Cook Electronics Ltd - London
- Scientifica Ltd - Uckfield
- Scimar Engineering Ltd - Exeter
- Scitec Instruments Ltd - Redruth
- Scitsu com - Sheffield
- Scomagg Ltd - Aberdeen
- Scorpion Group Security Solutions - Gloucester
- Scorpion Oceanics Ltd - Saffron Walden
- Scotaudio - Stirling
- Scotcomms Mobile Radio - Edinburgh
- Scotfax - Edinburgh
- ScotGold Products - Aberdeen
- Scotia Electronics - Dunfermline
- Scotia Energy Saving Systems Ltd - Glenrothes
- Scotland Electronics (International) Ltd - Forres
- Scotscraig Controls - Auchterarder
- Scott Carter Ltd - Kidderminster
- Scott Electromech - Belfast
- Scottish Electric Ltd - Dundee
- Scottish Enterprise - Glasgow
- Scottish Enterprise Forth Valley - Stirling
- Scottish Enterprise Lanarkshire - Bellshill
- Scottish Enterprise Renfrewshire - Paisley
- Scottish Telecommunications plc - Glasgow
- Screen Subtitling Systems Ltd - Ipswich
- Screencraft Ltd - London
- SCV (London) Ltd - Loughton
- SD Products - Mansfield
- SDA Electronics Ltd - Salford
- SDA Ltd - Windsor
- SDA Magnetics Ltd - Salford
- SDC Industries Ltd - East Kilbride
- SDF Electronics Ltd - Rossendale
- SDN CCTV - Selby
- SE Controls - Lichfield
- Seagate Technology - Londonderry
- Sealparts Ltd - Dudley
- Searchlight Electrics Ltd - Manchester
- Searle Manufacturing Co - Fareham
- Seatronics Ltd - Aberdeen
- Seaward Electronic Ltd - Peterlee
- Seawing Landguard International Ltd - Felixstowe
- Sebakmt UK - Calne
- Sebserv Ltd - London
- SEC Industrial Battery Co Ltd - Iver
- Seca Ltd - Birmingham
- Secomak Ltd - Edgware
- Secure Engineering Ltd - Maidstone
- Secure It All - Halesowen
- Secure Options Group Ltd - Oldham
- Secure Retail Ltd - Coalville
- Secure Systems and Technologies Ltd - Gloucester
- Securikey Ltd - Aldershot
- Securitech Systems Ltd - Brentwood
- Security and Control Scotland - Glasgow
- Security Consultancy and Technical Ltd - Croydon
- Sedgewall Communications Group Ltd - Dunstable
- Seetrax Cae Ltd - Poole
- SEG Protection Relays - Maidenhead
- Segmentis Ltd - Cambridge
- Seho UK Ltd - Manchester
- Seiko (UK) Ltd - Maidenhead
- Sel Tek Ltd - Motherwell
- Select Cables Ltd - Portsmouth
- Select Enclosures Ltd - Cheltenham
- Selectronic Ltd - Witney
- Selectronix Ltd - Aldermaston
- Selenia Communications Ltd, Secure Systems Division - Liverpool
- SELEX Communications Ltd - Chelmsford
- Selkom Ltd - Littlehampton
- Sellec Cables and Automation Ltd - Worksop
- Sellotape GB Ltd - Dunstable
- Seltec Automation - Hull
- Selux Lighting Ltd - Leamington Spa
- Selwyn Electronics Ltd - Sevenoaks
- SEM Technologies Ltd - Worksop
- Sematron (UK) Ltd - Basingstoke
- Seme Ltd - Melton Mowbray
- Semefab (Scotland) Ltd - Glenrothes
- Semelab plc - Lutterworth
- Semi Conductor Production Systems Ltd - Melrose
- Semi-Dice Power (UK) Ltd - High Wycombe
- Semicon Services - Kingsbridge
- Semiconductor Supplies International Ltd - Sutton
- Semikron Ltd - Hertford
- Semitest - Fairford
- Semtech - Romsey
- Senate Electrical Wholesalers Ltd - Rosyth
- Sencon (UK) Ltd - Worcester
- Senju Manufacturing (Europe) Ltd - High Wycombe
- Sensa Schlumberger - Southampton
- Sensatech Research Ltd - Brighton
- Sensemaster Ltd - Newport (Gwent)
- Sensing Devices Ltd - Southport
- Sensitised Coatings Ltd - Kings Lynn
- Sensonics Ltd - Berkhamsted
- Sensopad Ltd - Cambridge
- Sensor-Technik UK Ltd - Bedford
- Sensorbility Ltd - Salcombe
- Sensorcom Ltd - Beckenham
- Sensors UK Ltd - St Albans
- SensorsONE Ltd - Oakham
- Sensortechnics UK - Rugby
- Sensortek Ltd - Bury St Edmunds
- Sensortrol Ltd - Sheffield
- Sensortronic Ltd - Henley on Thames
- SEOS Ltd - Burgess Hill
- Sepro Robotique Ltd - Milton Keynes
- Sequis - Colchester
- Sequoia Technology Ltd - Reading
- Seratel Ltd - Westport
- SerCal Electronics Ltd - Doncaster
- Sercal NDT Equipment Ltd - Cannock
- Serck Controls Ltd - Coventry
- Serco - Waterlooville
- Serco Geografix Ltd - Norwich
- Sericol Imaging Ltd - Broadstairs
- Series 4 Ltd - Southampton
- Serpac Enclosures Ltd - Fareham
- Service Logic Ltd - St Albans
- Service System Ltd - Newcastle under Lyme
- ServiceCal Ltd - Manchester
- Servicepower Ltd - Shipley
- ServiceTec Ltd - Stevenage
- Serviscomm Ltd - Darlington
- Servitech International Ltd - Bedford
- Servo and Electronic Sales Ltd - Romney Marsh
- SES-Sterling Ltd - Telford
- Setech Solutions Ltd - Northampton
- Seton - Banbury
- Setsquare Ltd - Tonbridge
- Seven-Peas.co.uk Ltd - Chippenham
- Severn Controls Ltd - Stonehouse
- Severn Electric Co Ltd - Stourport on Severn
- Severn Sales - Bristol
- Severn Trent Water Ltd - Birmingham
- SEW Eurodrive Ltd - Stirling
- Seyco Ltd - London
- SFW - Woking
- SG Magnets Ltd - Rainham
- SGS (UK) Ltd - Camberley
- Shane Consultants Ltd - Wokingham
- Shanoc Electronic Systems Ltd - Stevenage
- Shareteq Ltd - Spalding
- Sharp Laboratories of Europe Ltd - Oxford
- Sharp Manufacturing Co (UK) - Wrexham
- Sharper Components Ltd - Windsor
- Sharples Stress Engineers Ltd - Preston
- Sharpmark Labelling Systems - Northampton
- Shaw Electronic Development Co - Accrington
- Shaw Moisture Meters Ltd - Bradford
- Shawcity Ltd - Faringdon
- Shawtech Ltd - Manningtree
- Shearwater Electronics Ltd - Colchester
- Sheen Instruments Ltd - Kingston upon Thames
- Shepherd Charles Ltd - Wokingham
- Sherborne Sensors Ltd - Basingstoke
- Sherborne Technical Services - London
- Sherwood Electronics - Long Eaton
- Shielding Solutions Ltd - Braintree
- Shindengen UK Ltd - Welwyn Garden City
- Shire Consulting Engineers - Bromsgrove
- Shire Controls Ltd - Harlow
- SHM Communications Ltd - Winchester
- Shootview Ltd - Sunbury on Thames
- Short Run Press Ltd - Exeter
- Shout Telecoms Ltd - Waterlooville
- Showtec Lighting and Sound - Shoreham by Sea
- ShP Solutions - Lancaster
- Shrink Polymer Systems - Rushden
- Shrink Sleeve Ltd - Sevenoaks
- Shrinkfast Ltd - Swindon
- Shrinktek Polymers International Ltd - Cheltenham
- Shunts Direct Ltd - Staines
- SI Consultants - Bury St Edmunds
- SI Plan Electronics - Coventry
- SI Plan Electronics Research Ltd - Stratford upon Avon
- Siam Control and Automation - Bromsgrove
- SIC - Manufacturing Excellence - Swansea
- Sicame Electrical Developments Ltd - Huddersfield
- SICK (UK) Ltd - St Albans
- Siegrist-Orel Ltd - Broadstairs
- SIEL UPS Systems Ltd - Dursley
- Siemens Automation and Drives - Manchester
- Siemens Building Technologies (Fire Protection) - Camberley
- Siemens Business Services - Bracknell
- Siemens Communications - Milton Keynes
- Siemens Magnet Technology - Eynsham
- Siemens plc - Bracknell
- Siemens Power Generation - Newcastle upon Tyne
- Siemens Power Transmission and Distribution - Manchester
- Sierra Integrated Systems - Yeovil
- Siga (Electronics) Ltd - Sandy
- Sight Systems Ltd - Worthing
- Sigma Marketing - Plymouth
- SigmaPrint Technologies Ltd (SMTECH Printers) - Weymouth
- Sign Services (UK) Ltd - Hull
- Signal Group Ltd - Camberley
- Signal House Ltd - Leighton Buzzard
- Signals UK - Birmingham
- Signatrol Ltd - Tewkesbury
- Signature Industries Ltd - London
- Signature Ltd / Signature Graphics - Oldbury
- Signet AC Ltd - Washington
- Signex Ltd - Bournemouth
- Signo Communication Electronics - Bedford
- Signpost Identity - Rowley Regis
- SIKO Ltd - Thirsk
- Silent Power Systems Ltd - Stoke on Trent
- Silicon 8 Ltd - Sevenoaks
- Silicon Glen Technologies Ltd - Glasgow
- Silicon Laboratories UK Ltd - Reading
- Silicon Microsystems Ltd - Malmesbury
- Silicone Engineering Ltd - Blackburn
- Silicone Fabrication Services Ltd - Luton
- Sillavan Anodes - Cannock
- Silva (UK) Production Ltd - Livingston
- Silvabronz - Alton
- Silver Telecom - Newport (Gwent)
- Silvertronic Ltd - Enfield
- Simac Masic - Dundee
- SimBal Ltd - High Peak
- Simclar International Ltd / Simclar Group Ltd - Dunfermline
- Simms Electrical Distributors Ltd - Halifax
- SimonG Ltd - Birmingham
- Simorg Ltd - Luton
- Simple Technology UK Ltd - Warrington
- Simpson Donald and Co - Denny
- Simpson Thompson Filtration Ltd - Stockport
- Simrad Ltd - Margate
- Simtec Electronics - Preston
- Simtech Simulation Techniques Ltd - Aylesbury
- Simtek - Rochdale
- Simtek EMS Ltd - Margate
- Simulation Systems Ltd - Bristol
- Simutech Electronics - Hull
- Sinclair Voicenet Ltd - East Kilbride
- Sinelco (Controlgear) - Glasgow
- Singapore Economic Development Board - London
- SingleRapid Ltd - Egham
- Sinolec Components Ltd - Guildford
- Sionics Ltd - Newmarket
- Sipex Corporation - Alton
- Sirus Microtech Ltd - Wellington
- SIS (Engineers) Ltd - Manchester
- SISD ltd - Stevenage
- Site Electrical Ltd - Manchester
- Siteguard UK Ltd - Ellesmere Port
- Sitelink Communications - Stockport
- Sitest Ltd - Wimborne
- SJ Electrical Ltd - Hull
- SJ Electronics Ltd - Kettering
- SJ Technologie - Kettering
- SJM Eurostat (UK) Ltd - Stockport
- SK Electronics Ltd - Oldham
- SKF Condition Monitoring Centre (Livingston) Ltd - Livingston
- Skilcom Ltd - Thatcham
- Skill Electronics Ltd - Birmingham
- SKN Electronics - Birmingham
- Skot Transformers Ltd - Malvern
- Skye Instruments Ltd - Llandrindod Wells
- Skylake Ltd - Southampton
- Skylark Energy Systems Ltd - Banchory
- Skymasts Antennas Ltd - Northampton
- Skyquest Ltd t/a Skyquest Aviation - Maidenhead
- Skytronic Ltd - Manchester
- SL Electrotech Ltd - Newcastle under Lyme
- SL Power Electronics - South Molton
- Slater Drive Systems - Prudhoe
- Slaters Electricals Ltd - Blaydon on Tyne
- SLB Electrical - Aldershot
- SLE Ltd - Croydon
- Slencrest Ltd - Maidstone
- Sloan Electronics Ltd - Gateshead
- SM Group (Europe) Ltd - Plymouth
- Smail Engineers (Glasgow) Ltd - Glasgow
- Small Battery Co The - London
- Small E Consulting Ltd - Hull
- Smallpeice Enterprises - Leamington Spa
- Smart CCTV Ltd - Havant
- Smart Communications - Borehamwood
- SMART Group, The - High Wycombe
- Smart POS Solutions Ltd - Barnsley
- Smart Shading Systems Ltd - West Drayton
- Smart Systems - Leicester
- Smart Thermal Solutions Ltd - Manchester
- Smart-e (UK) Ltd - Dorking
- SmartDrive Ltd - Huntingdon
- Smartpat Ltd - Manchester
- Smartscan Ltd - Corby
- Smatex Ltd - Salford
- SMC Electronics Ltd - Aldermaston
- SMC Pneumatics (UK) Ltd - Milton Keynes
- Smerdon and Jones - Plymouth
- Smith Jones Communications Ltd - Brackley
- Smith Myers Communications Ltd - Biggleswade
- Smith's Environmental Products Ltd - South Woodham Ferrers
- Smithbrook Ltd - Cranleigh
- Smiths Aerospace Machanical Systems - Wolverhampton
- Smiths Detection - Watford
- SMK (UK) Ltd - Newton Aycliffe
- SML Ltd - Barnet
- SMR Electronics Ltd - Swindon
- SMS Electronics Ltd - Beeston
- SMT Developments - Warwick
- Smth Aerospace Electronic Systems Southampton - Chandlers Ford
- Smye Holland Associates - Peterborough
- Snaar Ltd Electronics Design - Newbury
- Snaefell Aviation Design - Ryde
- Snelflight Ltd - Waterlooville
- Snell and Wilcox Ltd - Havant
- Snell and Wilcox Ltd - Liss
- Snell and Wilcox Ltd - Newbury
- Snell and Wilcox Ltd - Twickenham
- Socomec UPS Ltd - Cirencester
- Soft Edge Technologies Ltd - East Kilbride
- Softel Ltd - Reading
- Software Radio Technology plc - Bath
- Soil Instruments Ltd / ITM - Uckfield
- Solar Communications Ltd - Bristol
- Solartron Analytical - Farnborough
- Solartron Metrology Ltd - Bognor Regis
- Solbraze Ltd - Erith
- Solder School Technology - Glenrothes
- SolderStar Ltd - Manchester
- Solectron Ltd - Fareham
- Solectron Wales - Newport (Gwent)
- Solid Developments - Hastings
- Solid Solutions Management Ltd - Warwick
- Solid State Sound - Shaftesbury
- Solid State Supplies - Tonbridge
- Sollatek (UK) Ltd - Slough
- Sollatek Distribution Ltd - Slough
- Sollerta Ltd - Dorchester
- Soloheat - Stroud
- Solus Solutions Ltd - Glasgow
- Solutech Electronics - Leicester
- Solutions Audio Visual Ltd - Langport
- Solutions Ltd - Stockport
- Somerco Industrial Ltd - Cumbernauld
- SomerData Ltd - Wells
- Sonar Research and Development Ltd - Beverley
- Sonart Electronics Ltd - Dunfermline
- Sonavison Ltd - Aberdeen
- Sondia Lighting Ltd - Hull
- Sonic Communications (International) Ltd - Birmingham
- Sonifex Ltd - Wellingborough
- Sonix - Cwmbran
- Sono UK Ltd - Swindon
- Sontay - Edenbridge
- Sontec (Electronics) Ltd - Norwich
- Sontranic Ltd - Wembley
- Sony Manufacturing Co UK Ltd - Bridgend
- Sony Visual Systems Division - Bridgend
- SOR (Europe) Ltd - Horsham
- Sorion Electronics Ltd - Edgbaston
- SOS Communications - Horsham
- SouMac Assembly Services Ltd - Portsmouth
- Sound and Visual Ltd - Surbiton
- Sound Broadcast Services - Alcester
- Sound Dynamics Ltd - Belper
- Sound Induction Systems Ltd - Newtown
- Sound Leisure Ltd - Leeds
- Sound Technology plc - Letchworth
- Soundcraft - Potters Bar
- Sounds Incorporated - Knottingley
- Source - Plympton
- South East Charger Services - Braintree
- South Eastern Auto Electrical Services Ltd - Maidstone
- South Midlands Communications Ltd - Chandlers Ford
- South West Battery Charging Systems Ltd - Stroud
- South West Communications Group Ltd - Exeter
- South West Instrumentation - Devizes
- South West Metal Finishing Ltd - Exeter
- South Woodford Electronics Ltd - Bishops Stortford
- South Yorkshire Battery Services - Sheffield
- Southdown Circuits Ltd - Arundel
- Southern Calibration Laboratories Ltd - Southampton
- Southern Care Maintenance - Tonbridge
- Southern Electronics - North Shields
- Southern Scientific Ltd - Lancing
- Southesk Electronics - Forfar
- Southoe Comtech Ltd - St Neots
- Southworth Handling Ltd - Thatcham
- Souvenir Cranwell - Grantham
- Sovella - Horsham
- Sovereign Connections Ltd - Wokingham
- Sovereign Rotating Machines Ltd - Bognor Regis
- SP Electronics - Preston
- SP Roberts Insurance Services - Dunstable
- SP Wound Components - Poole
- Space Airconditioning plc - Guildford
- Space Electronics Ltd - Stratford upon Avon
- SpaceBreeze (EU) Ltd - Poole
- Spacelabs Healthcare Ltd - Chesham
- Sparc Systems Ltd - Malvern
- Sparex Ltd - Exeter
- Spark and Wire Ltd - Tamworth
- Sparks Electrical Wholesalers Ltd - London
- Sparks Laser Services Ltd - Basildon
- SPC International - Uxbridge
- Speake and Co Llanfapley - Abergavenny
- Speakerbus Ltd - Hoddesdon
- Special Application Products Ltd - Ipswich
- Specialised Video Services - Poole
- Specialist Alarm Services Ltd - Newcastle upon Tyne
- Specialist Battery Services - Nottingham
- Specialist Computer Centres plc - Birmingham
- Specialist Electronics Services Ltd - Camberley
- Specialist Heavy Engineers Ltd - Newport (Gwent)
- Specialist Microwave Solutions Ltd - Cranfield
- Specialist Power Systems Ltd - Cranfield
- Specialty Coating Systems Ltd - Woking
- Specialty Electric Motors Ltd - Lancing
- Spectech Ltd - Alton
- Spectra Displays Ltd - Cambridge
- Spectraglass Ltd - Perth
- Spectral Dynamics (UK) Ltd - Welwyn Garden City
- Spectral Ltd - Worthing
- Spectre (Communications) Ltd - Coalville
- Spectro Analytical UK Ltd - Halesowen
- Spectrogon UK Ltd - Glenrothes
- Spectronic Analytical Instruments - Leeds
- Spectrum Communications - Dorchester
- Spectrum Control - Great Yarmouth
- Speed Assembly Services Ltd - Chatham
- Speedboard - Windsor
- Speedboard Assembly Services Ltd - Windsor
- Speedboard Circuit Services - Windsor
- Speedy Cables Ltd - Hertford
- Speirs Robertson and Co Ltd - Bedford
- Spellman High Voltage Electronics Ltd - Pulborough
- Spelsberg ELS UK Ltd - Telford
- Spemco Teo - Donegal
- Spendor Audio Systems Ltd - Hailsham
- Sphere 2000 Ltd - London
- Spiers Electronics - Verwood
- Spirent Communications (Scotland) Ltd - Glasgow
- Spirent Communications (SW) Ltd - Paignton
- Spirent plc - Crawley
- Spirit Circuits Ltd - Waterlooville
- Spooner Industries Ltd - Ilkley
- SPQR Europe Ltd - Huntingdon
- Spring IT Solutions Ltd - London
- Sprint Electric Ltd - Arundel
- Sprint Ltd T/A SCS - Hove
- Spur Electron Ltd - Havant
- Spursmore Design Ltd - Exeter
- SPW Traffic Control Ltd - Stoke on Trent
- SPZ Metalforms - Poole
- SQN Electronics Ltd - Ballasalla
- Squarezone Ltd - Farnborough
- SRC Systems Ltd - Ipswich
- SRS Automation Ltd - Congleton
- SRS Products plc - Harlow
- SRS Telecom - Dunfermline
- SSDC Ltd - Basingstoke
- SSL - WinMan - Birmingham
- SSS Alarms & CCTV - Buckley
- SST Sensing Ltd - Bellshill
- St Albans Meter Co Ltd - St Albans
- St Cross Electronics Ltd - Southampton
- ST Electronics Ltd - Theale
- ST Microelectronics Ltd - Bristol
- ST Microelectronics Ltd - Marlow
- Stabilised Transformers Ltd - Wolverhampton
- Stable Micro Systems - Godalming
- Stack Ltd - Bicester
- Stadium Consumer Products - Hartlepool
- Stadium Electronics - Hartlepool
- Stadium Power - Diss
- Staeng Ltd - Truro
- Stafford Aero Technologies - Norwich
- Stag Instruments Ltd - London
- Stage Control Ltd - Edgware
- Stage Electrics - Avonmouth
- Stage Electrics - Birmingham
- Stage Electrics - Exeter
- Stage Electrics - London
- Stage Electrics - Newcastle upon Tyne
- Stamar Electronic Services - Lincoln
- Standard Signs and Traffic Systems Ltd - Newport (Gwent)
- Standby Production Services - Cinderford
- Standel Dawman Ltd - Nelson
- Standex Electronics (UK) Ltd - Tonbridge
- Stanford Battery Service - London
- Stanford Components Ltd - Stanford le Hope
- Stanford West Associates - Reading
- Stanghal Computing Ltd - Newcastle upon Tyne
- Stanler Components Ltd - Colchester
- Stanley Security Solutions - Swindon
- Stantech Electronics - Sevenoaks
- Staplethorne Ltd - Honiton
- Star Computers Ltd - Sutton Coldfield
- Star Instruments Ltd - Royston
- Star Micronics Europe Ltd - High Wycombe
- Starkey Laboratories Ltd - Stockport
- Starlec Electrical Supplies - Hemel Hempstead
- Starmount Ltd - Nelson
- Starna Industries Ltd - Romford
- Starpoint Adaptive Optics Ltd - Durham
- Startec Services - Eastbourne
- Static Control Components (Europe) Ltd - Reading
- Static Ltd - Perth
- Static Safe Environments - Birmingham
- Static Scotland Ltd - Dunfermline
- Static Systems Group plc - Wolverhampton
- Status Instruments Ltd - Tewkesbury
- Staubli UK Ltd - Telford
- Steadlands International Marketing Ltd - Blyth
- Steatite Ltd - Redditch
- Steels Engineering Services Ltd - Stockton on Tees
- Steepletone Products Ltd - Brackley
- Steinel (UK) Ltd - Peterborough
- Steljes Ltd - Brentford
- Stellar Controls Ltd - St Neots
- Stentofon - Zenitel UK - Crawley
- Step Enterprise Ltd - Nottingham
- Stephen Glover and Co Ltd - Walsall
- Stephen P Wales - Torquay
- Stephenson Control Systems - Harrogate
- Stephenson Research Ltd - Gateshead
- Steradian Ltd - Newton Abbot
- STERLING Sensors Ltd - Oldham
- Steven Peters Ltd - Royston
- Stevenage Circuits Ltd - Stevenage
- Stewart and Allen Ltd - Cheltenham
- Stewart Automotive Equipment - Windsor
- Stewart Technology Ltd - Galashiels
- Stickland Electronics - Kings Langley
- Stirling Intellect Ltd - Leigh on Sea
- Stirling Technology - Birmingham
- STL Stewart Transformers Ltd - London
- STL Transtech Ltd - Leicester
- Stock Electronics Ltd - Salisbury
- Stockall Electronics Ltd - Malvern
- Stocksigns Ltd - Redhill
- Stocom Ltd - Crewe
- Stokvis Tapes (UK) Ltd - Tring
- Stonefield Systems plc - Billingshurst
- Stonegate Instruments Ltd - Leeds
- Stoneridge Electronics - Dundee
- Stonewood Electronics Ltd - Wareham
- Stontronics Ltd - Reading
- Stop-choc Ltd - Slough
- Storage Products (SPS) Ltd - Stirling
- Storm Interface - West Drayton
- Storm Power - Rhyl
- Storm Products - East Kilbride
- Stormcut Ltd - York
- Stortech Electronics Ltd - Harlow
- Stotron - Cromarty
- Straight Plc - Leeds
- Strain Gauging Co Ltd, The - Alresford
- Strain Measurement Devices Ltd - Bury St Edmunds
- Strainstall UK Ltd - Cowes
- Strategix (TIS) Software - Bourne End
- Stratford Tools Ltd - Buckingham
- Stratos Ltd - Haverhill
- Stratton Technologies - Biggleswade
- Strayfield Ltd (Strayfield Fastran) - Theale
- Streetley Electronics UK - Rugeley
- Strikalite Batteries - Burntwood
- Strong Electronics Ltd - Whyteleafe
- Stroud Instruments Ltd - Stroud
- Stryke International - High Wycombe
- STS Defence Ltd - Gosport
- STS Signals Ltd - Wimborne
- STS Switchgear Ltd / STS Electric Motors - Cradley Heath
- Stuart (Photronics) Ltd - Manchester
- Stuart James Systems Ltd - Lichfield
- Studio 2 Online - Leicester
- Studio Systems Electronics Ltd - Wokingham
- Studweldpro (UK) Ltd - Newark
- Stylebord Ltd - Cambridge
- Styropack (UK) Ltd - Aberdeen
- Sub Assembly Services Ltd - Tewkesbury
- Sub Contract Services - Letchworth
- Suffolk Automation Ltd - Ipswich
- Sumitomo Electric Shrink Products - Swindon
- Sumitomo Electric Wire Products - SEI Interconnect Products Ltd - Swansea
- Sumlock Electronics Ltd - Newcastle upon Tyne
- Summit 1 Technology Ltd - Jarrow
- Summit Solder Products - Biggleswade
- Sumo Technologies Ltd - York
- Sun Chemical Circuits - Bath
- Sun Diagnostics UK - Kings Lynn
- Sun Microsystems Ltd - Camberley
- Sun Microsystems Ltd - Linlithgow
- Sunalex Ltd - Aylesbury
- Sunbridge Electrical Wholesalers - Bradford
- Sunpower (UK) Ltd - Aldermaston
- Sunvic Controls Ltd - Glasgow
- Supac Ltd - Pontypridd
- Superchips Ltd - Buckingham
- SuperGPS - Altrincham
- Superior Systems - Coventry
- Superspares - London
- Supplyline Auto ID - Horsham
- Suppression Devices - Clitheroe
- Sure 24 Ltd - Nottingham
- SureScreen Diagnostics Ltd - Derby
- Surface Mount Electronics Ltd - Worthing
- Surface Mount Technology - Cowes
- Surface Technology International Ltd - Hook
- Surface Technology Systems plc (STS) - Newport (Gwent)
- Surgebuster Ltd - Bideford
- Surgecam Ltd - Seaham
- Surgetech Ltd - Emsworth
- Surtech Distribution Ltd - Andover
- Suss MicroTec Ltd - Lincoln
- Sussex Assemblies Ltd - Porslade
- Sutronics - Swanage
- Swagelok Bristol - Avonmouth
- Swale Components Ltd - Whitstable
- Swan Computer Brokers - Dartford
- Swan EMS Ltd - Abertillery
- Swan Generators Ltd - Banbury
- Sweco Europe UK Division - Stoke on Trent
- Swift Automation and Control Systems Ltd - Carlisle
- Swift Circuits Ltd - Llanelli
- Swindon Silicon Systems Ltd - Swindon
- Swiss Mimic Co Ltd - Chertsey
- Swiss Travel Products UK - Harrogate
- Switch2 Energy Solutions Ltd - Bradford
- Switchcom (UK) Ltd - Wimborne
- Switchcraft Inc - Portsmouth
- Switchcraft Technology Ltd - Southampton
- Switched Mode Ltd - Theale
- Switchgear and Instrumentation Ltd - Bradford
- Switchgear Services Ltd - Honiton
- Switchgear Spares and Accessories - Sutton in Ashfield
- Switching Components Co - East Grinstead
- Switchtec Ltd - Stone
- SY Electronics Ltd - Salford
- Sycopel International Ltd - Jarrow
- Sycopel Scientific Ltd - Washington
- Sycos AES - Dunstable
- Syfer Technology Ltd - Norwich
- Sygnus Data Communications Ltd - Beaconsfield
- Sykes Pickavant (OEM Division) Ltd - Cannock
- Symbia Ltd - London
- Symicron Computer Communication Ltd - London
- Synapsys Solutions Ltd - Hassocks
- Synatel Instrumentation Ltd - Cannock
- Synectic Design Ltd - Bolton
- Synectics - Sheffield
- Synectics Industrial Systems Ltd - Brigg
- Synectix Ltd - Cheltenham
- Synergie-Cad (UK) Ltd - Lincoln
- Synergy Resourcing International Ltd - West Byfleet
- Synopsys (Northern Europe) Ltd - Reading
- Synoptics Ltd - Cambridge
- Syntech - Paignton
- Syntegra Ltd - Sunbury on Thames
- SysMedia Ltd - Horley
- Systech Controls Ltd - Stafford
- Systech Instruments - Thame
- Systegration Ltd - Littlehampton
- System Connections (Cambridge) - Cambridge
- System Control Solution Ltd - Lowestoft
- System Group - Carlisle
- System Three Technology Ltd - Kings Lynn
- Systematics Printed Circuits Ltd - Southampton
- Systemation Euro Ltd - Northampton
- Systems Power Engineering Ltd - Abercarn
- Systems Services - Boston
- Systems Technology - Rochester
