• 1st Communications Installation & Maintenance Ltd
  15 Bowling Green Lane, LONDON, Greater London, EC1R 0BD
• 1st Communications Installation & Maintenance Ltd
  Pegasus House, 116-120 Golden Lane, LONDON, Greater London, EC1Y 0TF
• 4 Thought
  17 Mill Lane, WELWYN, Hertfordshire, AL6 9EU
• A K D Communications Ltd
  PO Box 499, Aston Clinton, AYLESBURY, Buckinghamshire, HP22 5GZ
• A W S
  46 Hyde Road, Caddington, LUTON, Bedfordshire, LU1 4HE
• Absolute Voice & Data
  Scotsbridge House, Scots Hill, Croxley Green, RICKMANSWORTH, Hertfordshire, WD3 3BB
• Activ8 Distribution
  Unit 22 Park House, 15-19 Greenhill CR, WATFORD, Hertfordshire, WD18 8PH
• Advanced Technology
  1 Johnson Court, HEMEL HEMPSTEAD, Hertfordshire, HP3 9JT
• Aerial Engineering Co Ltd
  5 Curfew Yard, Thames Street, WINDSOR, Berkshire, SL4 1SN
• Airspan Communications Ltd
  Cambridge House, Oxford Road, UXBRIDGE, Middlesex, UB8 1UN
• Airspan Networks Eastern Europe Ltd
  Cambridge House, Oxford Road, UXBRIDGE, Middlesex, UB8 1UN
• Alban Telecom Ltd
  Apsley Mill Cottage, London Road, HEMEL HEMPSTEAD, Hertfordshire, HP3 9QU
• Alpha Lift Installations Ltd
  Unit 201 Lee Valley Technopark, Ashley Road, LONDON, Greater London, N17 9LN
• Alphatel
  123 Bickenhall Mansions, Bickenhall Street, LONDON, Greater London, W1U 6BT
• Antenna Systems Ltd
  Unit 1 Dicker Mill, HERTFORD, Hertfordshire, SG13 7AE
• Applied Telecom
  11a Pinkneys Road, MAIDENHEAD, Berkshire, SL6 5DJ
• Archway Trading Co Ltd
  502 Hornsey Road, LONDON, Greater London, N19 4EF
• Argyll Business Centres Head Office
  Arundel House, 31a ST. James's Square, LONDON, Greater London, SW1Y 4JR
• Aspect Software UK Ltd
  2 The Square, Stockley Park, UXBRIDGE, Middlesex, UB11 1AD
• Aspen Electronics Ltd
  1-3 Kildare Close, RUISLIP, Middlesex, HA4 9UR
• Astarte Business Communications Ltd
  Lee Valley Technopark, Ashley Road, LONDON, Greater London, N17 9LN
• Astra Telecom Ltd
  26 Peartree Court, WELWYN GARDEN CITY, Hertfordshire, AL7 3XN
• Aur Telephones
  260 Tottenham Court Road, LONDON, Greater London, W1T 7RF
• Benetix Ltd
  Unit 14 Grove Park Industrial Estate, Waltham Road, White Waltham, MAIDENHEAD, Berkshire, SL6 3LW
• Bestway Communications Ltd
  Lee Valley Technopark, Ashley Road, LONDON, Greater London, N17 9LN
• Bruel & Kjaer
  92 Uxbridge Road, Harrow Weald Lodge, HARROW, Middlesex, HA3 6BZ
• Bulk GSM
  Unit 25 Cygnus Business Centre, Dalmeyer Road, LONDON, Greater London, NW10 2XA
• C K Business Systems
  46 Horsenden La North, GREENFORD, Middlesex, UB6 0PA
• Callsaver Telecoms Ltd
  20 Caledonian Road, LONDON, Greater London, N1 9DU
• Capital Communications Ltd
  9 Manor Courtyard, Hughenden Avenue, HIGH WYCOMBE, Buckinghamshire, HP13 5RE
• Cardslot Ltd
  3 Rundell Crescent, LONDON, Greater London, NW4 3BS
• Certacom (Switching) Ltd
  1 Holtspur Lane, Wooburn Green, HIGH WYCOMBE, Buckinghamshire, HP10 0AA
• Chelsea Telecom Ltd
  3 Windmill House, Windmill Walk, LONDON, Greater London, SE1 8LX
• Chiltern Telecom Ltd
  61 Union Street, DUNSTABLE, Bedfordshire, LU6 1EX
• City Telecom
  36 Golders Gardens, LONDON, Greater London, NW11 9BU
• Communicatex Ltd
  196 High Road, LONDON, Greater London, N22 8HH
• Communication & Technical Services Ltd
  17 Pages Walk, LONDON, Greater London, SE1 4SB
• Communications Accessories & Equipment Ltd
  Unit 19 Apex Business Centre, Boscombe Road, DUNSTABLE, Bedfordshire, LU5 4SB
• Communio Group Ltd
  1 Frogmore Road Industrial Estate, Frogmore Road, HEMEL HEMPSTEAD, Hertfordshire, HP3 9TG
• Comverse UK Ltd
  Cranbourne House, 135 Bath Road, SLOUGH, Berkshire, SL1 3UX
• Connect Communications Holdings Ltd
  Hertford House, 1 Cranwood Street, LONDON, Greater London, EC1V 9QP
• Conor & Stuart Communications Ltd
  130 Park Avenue, BUSHEY, Hertfordshire, WD23 2BB
• Converse UK Ltd
  Hertford Place, RICKMANSWORTH, Hertfordshire, WD3 9XF
• Cryo Systems Ltd
  Eaton House, Eaton Green Road, LUTON, Bedfordshire, LU2 9LD
• Cubix Ltd
  34 Candlemas Lane, BEACONSFIELD, Buckinghamshire, HP9 1AF
• Daltec Associates Ltd
  5 Oxford Road, Wealdstone, HARROW, Middlesex, HA3 7RG
• Data Sharp
  Snaresbrook Drive, STANMORE, Middlesex, HA7 4QN
• Data-Flo Business Solutions
  Research House, Fraser Road, Perrivale, GREENFORD, Middlesex, UB6 7AQ
• Datacomms
  Berry Lane, Chorleywood, RICKMANSWORTH, Hertfordshire, WD3 5EX
• Datasharp It Solutions
  Cardinal Point, Park Road, RICKMANSWORTH, Hertfordshire, WD3 1RE
• Datasharp Telecom
  Linton House, The Rowans, Chalfont St. Peter, GERRARDS CROSS, Buckinghamshire, SL9 8SE
• Datasource
  57 Verulam Gardens, LUTON, Bedfordshire, LU3 3SE
• Direct Telecommunications I.T Services Ltd
  5 Drakes Courtyard, 291 Kilburn High Road, LONDON, Greater London, NW6 7JR
• Discount Payphones
  177 High Street, Langley, SLOUGH, Berkshire, SL3 8LP
• Diva Communications Ltd
  196 High Road, LONDON, Greater London, N22 8HH
• Dual Tech Communications
  196 High Road, LONDON, Greater London, N22 8HH
• Duplex Corporate Communications
  55 Station Road, BEACONSFIELD, Buckinghamshire, HP9 1QL
• E & H Communications
  23 Mount Grace Road, POTTERS BAR, Hertfordshire, EN6 1RD
• Easaphone Services
  29a Greencroft Gardens, LONDON, Greater London, NW6 3LN
• Ecocall Ltd
  Ver House, 23 High Street, Redbourn, ST ALBANS, Hertfordshire, AL3 7LE
• Elephant Talk Communications PRS U.K. Ltd
  Unit 24 Hallmark Trading Estate, Fourth Way, Wembley, Middlesex, HA9 0LB
• Em: Seven Communications
  11 Chenies Street, LONDON, Greater London, WC1E 7EY
• Envoy Holdings Ltd
  2 The Square, Stockley Park, UXBRIDGE, Middlesex, UB11 1AD
• European Federal Bank Ltd
  Kemp House, 152-160 City Road, LONDON, Greater London, EC1V 2NX
• European Gateway
  140-142 King's Cross Road, LONDON, Greater London, WC1X 9DS
• European Moulin Rouge Ltd
  Kemp House, 152-160 City Road, LONDON, Greater London, EC1V 2NX
• Eurotraders UK Ltd
  Kemp House, 152-160 City Road, LONDON, Greater London, EC1V 2NX
• Evolution Voice & Data plc
  36 Groveeat ST. Helen's, LONDON, Greater London, EC3A 6AP
• Excell Business Systems
  53 Frith Street, LONDON, Greater London, W1D 4SN
• Excellent Communications Ltd
  50 Regent St, LONDON, Greater London, W1B 5RD
• Exchange Communications (U.K.) Ltd
  3 Metro Centre, Ronsons Way, Sandridge, ST ALBANS, Hertfordshire, AL4 9QT
• F.B.S. Telecommunications Ltd
  19 Hemel Hempstead Road, Redbourn, ST ALBANS, Hertfordshire, AL3 7NL
• Flix
  16a Chelsea Wharf, Lots Road, LONDON, Greater London, SW10 0QJ
• Funis
  Star House, Star Road, UXBRIDGE, Middlesex, UB10 0QH
• G M A UK Ltd
  PO Box 581, Croxley Green, RICKMANSWORTH, Hertfordshire, WD3 3ZY
• G P T Video Systems
  Foundation Park, 6 Roxborough Way, MAIDENHEAD, Berkshire, SL6 3UD
• GC Communication Systems
  32 Highland Road, AMERSHAM, Buckinghamshire, HP7 9AX
• Gigasat Ltd
  21 Moor End, Eaton Bray, DUNSTABLE, Bedfordshire, LU6 2HN
• Glovicom
  50 Regent St, LONDON, Greater London, W1B 5RD
• Grapevine Communications London
  488 ST. Albans Road, WATFORD, Hertfordshire, WD24 6QU
• Grapevine Communications Ltd
  346-348 ST. Albans Road, WATFORD, Hertfordshire, WD24 6PQ
• Hadi Telecommunications
  45 Commercial Street, LONDON, Greater London, E1 6BD
• Hi Tech Network Solutions Ltd
  33 Rushworth Street, LONDON, Greater London, SE1 0RB
• Hillside Telecom
  227 Nether Street, LONDON, Greater London, N3 1NT
• I C S Telecomm UK Ltd
  67 Brick Lane, LONDON, Greater London, E1 6QL
• I D S Group
  2 Long Street, LONDON, Greater London, E2 8HJ
• In Touch Technologies
  The Counting House, 9 High Street, TRING, Hertfordshire, HP23 5AH
• In Touch Technologies UK Ltd
  81-82 Akeman Street, TRING, Hertfordshire, HP23 6AF
• Internal Communications Network Ltd
  268 Hackney Road, LONDON, Greater London, E2 7SJ
• Internet Videocommunications Ltd
  Alexander House Mere Park, Dedmere Road, MARLOW, Buckinghamshire, SL7 1FX
• Irte International Ltd
  42 Prince George Avenue, LONDON, Greater London, N14 4TP
• Jeffrey C Black & Associates
  The Coach House, King Street, LONDON, Greater London, N2 8EA
• Kddi Eastern Europe Ltd
  Atlas House, 1-7 King Street, LONDON, Greater London, EC2V 8AU
• Kingston Business Communications
  30 St James's Street, LONDON, Greater London, SW1A 1HB
• Kokusai Electric Europe GmbH
  West Cross Centre, Great West Rd., BRENTFORD, Middlesex, TW8 9ER
• Landmark Mayo Communications Ltd
  9 Manor Courtyard, Hughenden Avenue, HIGH WYCOMBE, Buckinghamshire, HP13 5RE
• Latitude Communications
  50 Regent St, LONDON, Greater London, W1B 5RD
• Live Link Video Communications Ltd
  Alexander House Mere Park, Dedmere Road, MARLOW, Buckinghamshire, SL7 1FX
• London Central Communications Ltd
  81 Southwark Street, LONDON, Greater London, SE1 0HX
• Longcroft (GX) Management Company Ltd
  49 Station Road, GERRARDS CROSS, Buckinghamshire, SL9 8ES
• Macfarlane Telesystems Ltd
  22-26 Albert Embankment, LONDON, Greater London, SE1 7TJ
• Matrix Communications
  707 High Road, LONDON, Greater London, N12 0BT
• Meteor Communication Ltd
  Hertfordshire Business Centre, Alexander Road, London Colney, ST ALBANS, Hertfordshire, AL2 1JG
• Microwave Network Inc
  7 Clivemont Road, MAIDENHEAD, Berkshire, SL6 7BU
• Miton Systems Ltd
  49 Dove Park, Chorleywood, RICKMANSWORTH, Hertfordshire, WD3 5NY
• Mobestar Ltd
  1 Marylebone High Street, LONDON, Greater London, W10 4NB
• Mobyko Ltd
  Third Floor, 27 Beak Street, LONDON, Greater London, W1F 9RU
• More International
  1 Buckingham Place, Bellfield Road, HIGH WYCOMBE, Buckinghamshire, HP13 5HW
• Multi Products Corporation Ltd
  10 Dudley Street, LUTON, Bedfordshire, LU2 0NT
• Multimessage Systems Ltd
  Units 1 & 2 Block 26, Cranborne Industrial Estate, Cranborne Road, POTTERS BAR, Hertfordshire, EN6 3JH
• Navtel Communications
  Fountains Road, LUTON, Bedfordshire, LU3 1LU
• North West Telecom
  40 Craven Park Road, LONDON, Greater London, NW10 4AE
• Nu Technologies Ltd
  Regent Court, Laporte Way, LUTON, Bedfordshire, LU4 8LW
• Olympia Technology
  5 Archdale Business Centre, Brember Road, HARROW, Middlesex, HA2 8DJ
• Open Telecommunications Ltd
  Lee Valley Technopark, Ashley Road, LONDON, Greater London, N17 9LN
• Pinnacle Communications Ltd
  60 Southwark Bridge Road, LONDON, Greater London, SE1 0AS
• Primex Solutions
  Crystal House, 7 New Bedford Road, LUTON, Bedfordshire, LU1 1HS
• Procom (Installations) Ltd
  H Abbeygate Business Centre, Hitchin Road, LUTON, Bedfordshire, LU2 0ER
• Quick Eagle Networks
  Cardinal Point, Park Road, RICKMANSWORTH, Hertfordshire, WD3 1RE
• Romtrac
  50 Featherstone Street, LONDON, Greater London, EC1Y 8RT
• S W Communications
  38 Station Road, North Harrow, HARROW, Middlesex, HA2 7SE
• Scan Mobile
  85 Clerkenwell Road, LONDON, Greater London, EC1R 5AR
• Scribble Communications Ltd
  MWB Business Exchange, 2 Gayton Road, HARROW, Middlesex, HA1 2XU
• Sedgewall Communications Group Ltd
  Unit 19 Apex Business Centre, Boscombe Road, DUNSTABLE, Bedfordshire, LU5 4SB
• Sound Concepts
  56 St Saviours Cresent, LUTON, Bedfordshire, LU1 5HG
• Splicecom Telecommunications Equipment
  The Hall Business Centre, Berry Lane, Chorleywood, RICKMANSWORTH, Hertfordshire, WD3 5EX
• Sterry Communications Ltd
  6 Silver Court, Watchmead, WELWYN GARDEN CITY, Hertfordshire, AL7 1LT
• Sword Telecommunications Ltd
  218 Eversholt Street, LONDON, Greater London, NW1 1BD
• Synectiv
  MWB Business Exchange, 2 Gayton Road, HARROW, Middlesex, HA1 2XU
• T C L Communications Ltd
  67 Crabtree Lane, LONDON, Greater London, SW6 6LP
• T S I
  Unit 201 Lee Valley Technopark, Ashley Road, LONDON, Greater London, N17 9LN
• T.Mina Communication
  88 Leagrave Road, LUTON, Bedfordshire, LU4 8HZ
• Talkforless Communications Ltd
  Unit 24 Hallmark Trading Estate, Fourth Way, Wembley, Middlesex, HA9 0LB
• Target Telecom
  Unit 18, Thrales End Lane, HARPENDEN, Hertfordshire, AL5 3NS
• Tech Wonders
  Unit 29 Park Royal Business Centre, 9-17 Park Royal Road, LONDON, Greater London, NW10 7LQ
• Technical Professional Radio Solutions Ltd
  1 Grove Park Industrial Estate, White Waltham, MAIDENHEAD, Berkshire, SL6 3LW
• Telecom Maintenance Ltd
  Douglas House, 16-18 Douglas Street, LONDON, Greater London, SW1P 4PB
• Telecom Resource
  Archway House, Orphanage Road, WATFORD, Hertfordshire, WD17 1PG
• Telecom Trading Services Ltd
  1 Fountayne Road, LONDON, Greater London, N15 4QL
• Telecomet International Ltd
  4th Floor, Atlas House, LONDON, Greater London, EC2V 8AU
• Telenova Ltd
  144 Regina Road, SOUTHALL, Middlesex, UB2 5PP
• Telinet Ltd
  Telinet House, 52 Southwark Bridge Road, LONDON, Greater London, SE1 0AR
• The Professional Monitor
  43-45 Crawley Green Road, LUTON, Bedfordshire, LU2 0AA
• The Telecom Consultancy