Company Index
- H & H Services Ltd - Nottingham
- H & H Video & Television - Ellesmere Port
- H C Starck Ltd - Calne
- H E Electronics Ltd - Wimborne
- H Preston - Malvern
- H Roberts and Sons (Dial Indicators) Ltd - Leicester
- H Tec Ltd - Southampton
- H-Squared Electronics Ltd - Shefford
- H. Scientific Ltd - Waterlooville
- H. Shaw Magnets Ltd - Sheffield
- H.S. Dataline Ltd - Birmingham
- H.V. Skan Ltd - Solihull
- Haani Cables Ltd - Hartlepool
Habia Cable Ltd - Bristol- Haes Systems (Manufacturing) Ltd - Uxbridge
- Hager UK Ltd - Telford
- Hagglunds Drives Ltd - Normanton
- Halcyon Drives Ltd - Leeds
- Hale Instruments Ltd - Altrincham
- Hallmark Electronics Ltd - Newcastle under Lyme
- Hamamatsu Photonics (UK) Ltd - Welwyn Garden City
- Hameg UK Ltd - St Neots
- Hamilton Hall Consultants Ltd - Alton
- Hamilton Litestat - Warminster
- Hamilton Rentals plc - London
- Hamlin Electronics - Diss
- Hammond Electronics Ltd - Basingstoke
- Hanning Ltd - Burton on Trent
- Hanovia Ltd - Slough
- Hansa Associates Ltd - Congleton
- Hantarex International Ltd - London
- Hanwell Instruments Ltd - Letchworth
- Haredata Electronics - Harrogate
- Harford Dictation Systems Ltd - Coventry
- Harland Simon plc - Bletchley
- Harland Simon UPS Ltd - Milton Keynes
- Harlequin Electronics - Rushden
- Harman Becker Automotive Systems Ltd - Bridgend
- Harmer and Simmons Ltd - Ilford
- Harmsworth Townley & Co Ltd - Todmorden
- Harpers A.V. Ltd - Woking
- Harpscreen (Gb) Ltd - St Helens
- Harris C J Electronic Components - Tunbridge Wells
- Harris Systems Ltd - Wokingham
- Harrison & Greenwood (Transformers) Ltd - Halifax
- Harrison Electrical Ltd - Leeds
- Harrison Electronics - March
- Harrison-Croft Ltd - Heathfield
- Harrow Lighting Centre - Wembley
- Hart Instruments Ltd - Swadlincote
- HARTING Integrated Solutions Ltd - Northampton
- HARTING Ltd - Northampton
- Harty Electronics Ltd - Henley on Thames
- Harvard Centro - London
- Harvard Manufacturing Ltd - Newry
- Harwin plc - Portsmouth
- Harwood Enterprises Ltd - Letchworth
- Hasco Components International - Taunton
- Hasco-Internorm Ltd - Daventry
- Hassett Industries Ltd - Salisbury
- Hathaway Systems Ltd - Belfast
- Haven Systems Ltd - Milford Haven
- Hawco Ltd - Godalming
- Hawk Electronics Ltd - Accrington
- Hawke Systems - Slough
- Hawker Energy Products Ltd - Manchester
- Hawker Siddeley Switchgear Ltd - Blackwood
- Hawkeye Security and Surveillance Systems Ltd - London
- Hawkshead Designs Ltd - Porthtowan
- Hayakawa International (UK) Ltd - Wrexham
- Haynes RF Ltd - Colchester
- Hayward Holdings Ltd - Chesham
- Haze Batteries - Corby
- Haze Batteries Europe Ltd - Romsey
- Hazledine Electronics Ltd - Telford
- HB Modules Ltd - Cheltenham
- HB Technologies Ltd - Newton Aycliffe
- HBL NiCad Batteries (UK) Ltd - Rugby
- HBM (UK) Ltd - Harrow
- HC Controls Ltd - Stockton on Tees
- HCD Research Ltd - Burgess Hill
- HDL (Electronics) Ltd - East Kilbride
- HE Controls Ltd - Southport
- Headset Co UK Ltd, The - Bristol
- Heart Electronics Ltd - Nuneaton
- Heating Spares Specialists Ltd - Poole
- Heatmiser Uk Ltd - Darwen
- Heatrae Sadia Heating - Norwich
- Heatsense Cables Ltd - Rochdale
- Heaven Dowsett and Co Ltd - Birmingham
- Heber Ltd - Stroud
- Hech Engineering Ltd - Bedlington
- Heidenhain (GB) Ltd - Burgess Hill
- Heinzmann UK Ltd - Darlington
- Helium Projects Ltd - Worthing
- Helix Technology UK (now part of Brooks Automation) - Bracknell
- Hellermann Tyton - Wythenshawe
- HellermannTyton - Aldridge
- HellermannTyton Data Ltd - Northampton
- Helmsman Electronics Ltd - Blackpool
- Helvar Merca Ltd - Dartford
- Hemco Power and Control Systems Ltd - Eastleigh
- Hemplan Design Ltd - Gloucester
- Henri Picard and Frere Ltd - Dorking
- Henry Cooch and Son Ltd - Sevenoaks
Henrys Electronics Ltd - London- Heraeus Amba Ltd - Banbury
- Heraeus Electro-Nite (U K) Ltd - Chesterfield
- Heraeus Materials Ltd - Stoke on Trent
- Heraeus Noblelight Analytics Ltd - Cambridge
- Herald Electronics Ltd - Bath
- Hereford Rewinds Ltd - Hereford
- Herga Electric Ltd - Bury St Edmunds
- Hertford Controls Ltd - Ware
- Herts Meter Co Ltd - Hatfield
- Hewlett Enterprises - Liverpool
- Hewlett-Packard Ltd - Birmingham
- Hewlett-Packard Ltd - Bracknell
- Hewlett-Packard Ltd - Bristol
- Hewlett-Packard Ltd - South Queensferry
- Hewlett-Packard Ltd - Stockport
- Heywood Associates - London
- HF Communications Solutions - Cambridge
- HF Instruments Ltd - Alton
- HFX Ltd - Bishops Stortford
- Hgl Dynamics Ltd - Godalming
- Hi 5 Electronics Ltd - Rochdale
- Hi Powertronics - Westbury
- Hi-Press Hydraulics Ltd - High Peak
- Hi-Rel Lids Ltd - Harleston
- Hi-Tech Automation Ltd - Kettering
- Hi-Tech Design Ltd - Waterlooville
- Hi-Tech Imaging Ltd - Southend on Sea
- Hi-Tech Mouldings Ltd - Waterlooville
- HiDef Solutions - Swindon
- Hiden Analytical Ltd - Warrington
- High Pressure Hire Ltd - Hook
- High Voltage Systems Ltd - Northampton
- High Voltage Technology - Dunmow
- Highblade Cables - Appleby
- Highland Scientific - Bedford
- Highwater Designs Ltd - Cheltenham
- Hilclare Ltd - Manchester
- Hilger Crystals Ltd - Margate
- Hiline Communications Ltd - Kingswinford
- Hill and Sons - High Peak
- Hill Electrical and Mechanical plc - Walsall
- Hillcrest Engineering Instrumentation Ltd - Leek
- Hillday Ltd - Attleborough
- Hillstone Products Ltd - Bury
- Hilltop Products (Insulation Sleevings) Ltd - Warrington
- Hine Engineering Ltd - Bradford
- Hirose Electric U K Ltd - Milton Keynes
- Hirschmann Automation & Control Ltd - Birmingham
- Hirst Magnetic Instruments Ltd - Falmouth
- Hitachi Automotive Products Europe Ltd - Bolton
- Hitachi Data Systems - Slough
- Hitachi Europe Ltd - Maidenhead
- Hitaltech U.K. Ltd - Preston
- Hitek Electronic Materials Ltd - Scunthorpe
- Hitek Ltd - Horsham
- HiTek Power Ltd - Littlehampton
- HITEK-Nology Solutions Ltd - Derby
- Hitel Communication Systems - Bootle
- Hitex (UK) Ltd - Coventry
- Hivolt Capacitors Ltd - Londonderry
- HNL Engineering - Stockton on Tees
- Hocken Audio Visual Ltd - Tadworth
- Hofbauer (UK) Ltd - Gloucester
- Hohner Automation Ltd - Wrexham
- Hollin Applications - Bishop Auckland
- Hollybank Electronics Exchange - Southampton
- Holroyd Instruments Ltd - Matlock
- Holt Broadcast Services 2004 Ltd - Reading
- Homag UK Ltd - Derby
- Homewatch Ltd - Glasgow
- Honda Connectors Ltd - Swindon
- Honeysett Computers Ltd - Wigton
- Honeywell (Cooling and Refrigeration) - Motherwell
- Honeywell Aerospace Uk - Yeovil
- Honeywell Control Systems - Bracknell
- Honeywell Control Systems Ltd - Bristol
- Honeywell Control Systems Ltd - Manchester
- Honeywell Control Systems Ltd - Motherwell
- Honeywell Control Systems Ltd - Sunderland
- Honeywell Imaging and Mobility - Warrington
- Honeywell Security and Custom Electronics - East Kilbride
- Hong Kong Trade Development Council - London
- Honle UV (UK) Ltd - Aldridge
- Hook & Tucker Zenyx Ltd - Croydon
- Horkesley Electronics Ltd - Colchester
- Hormann Electronics - Cork
- Horsell Electrics Ltd - Brighton
- Horsham Business Systems Ltd - Horsham
- Horstmann Controls Ltd - Bristol
- HortiMax Ltd - York
- Horwich Electronic Laboratories Ltd - Bolton
- Hosiden Besson Ltd - Hove
- Hoskin Melvyn H - Rugby
- Hothouse PDP - London
- House-on-the-Hill Software - Stockport
- Household Automation Ltd - Horsham
- Hovercam Ltd - Plymouth
- Howard Butler Ltd - Walsall
- Howard Eaton Lighting Ltd - Lewes
- Howarth Switchgear Ltd - Glasgow
- HPC Engineering plc - Burgess Hill
- HR Smith Group (T/u Techtest Ltd) - Leominster
- Hs Marston Aerospace Ltd - Wolverhampton
- Hs Sports Ltd - Congleton
- Htc Group Ltd - Watford
- Hua Yan Technologies Co Ltd - Shanghai
- Huba Control AG Branch Office UK - Witney
- Huber + Suhner (Uk) Ltd - Bicester
- Huggett Electrical Ltd - Bath
- Hughes Electronics Ltd - London
- Humber Electrical Engineering Co Ltd - Hull
- Humber Telecom Ltd - Grimsby
- Humiseal Europe Ltd - Camberley
- Hummel Ltd - Leigh
- Hunt Engineering (U K) Ltd - Highbridge
- Hunter Cable Assembly - Theale
- Huntleigh Healthcare Ltd - Cardiff
- Hursley EMC Services - Chandlers Ford
- Husky Injection Moulding Systems UK Ltd - Coventry
- Hussain Ali - Chorley
- HV Wooding Ltd - Hythe
- HVR International Ltd - Jarrow
- Hybec Ltd - Leicester
- Hybrid Laser Technology Ltd - Ely
- Hybrid Technology Services Ltd - Yate
- Hyco Manufacturing Ltd - Castleford
- Hycontrol Ltd - Redditch
- Hydram Engineering Ltd - Ferryhill
- Hydramotion Ltd - Malton
- Hydrobond Engineering Ltd - Aberdeen
- Hydrocable Systems Ltd - Aberdeen
- Hydrosphere U K Ltd - Alton
- Hylec APL - Wellingborough
- Hypercom GB Ltd - Salisbury
- Hypertac Ltd - London
- Hypertec Ltd - Hungerford
- Hytec Information Security Ltd - Witney
