• 31e Cellular
  Westworld, West Gate, LONDON, Greater London, W5 1XP
• A A Communications
  174 Brabazon Road, HOUNSLOW, Middlesex, TW5 9LP
• BH Communications
  Suite 33, 10 Barley Mow Passage, LONDON, Greater London, W4 4PH
• Berkley Management Services Ltd
  1 Berkley Road, BEACONSFIELD, Buckinghamshire, HP9 2AY
• Business Telecommunications Services Ltd
  Wood End, The Friary, Old Windsor, WINDSOR, Berkshire, SL4 2NR
• C.F.M Communications
  Empire House, Empire Way, WEMBLEY, Middlesex, HA9 0EW
• C4communication Ltd
  Empire House, Empire Way, WEMBLEY, Middlesex, HA9 0EW
• CCG Corporate Consulting Group Ltd
  Nash House, Repton Place, AMERSHAM, Buckinghamshire, HP7 9LP
• Cascadia Connections
  47 Blandford Road, LONDON, Greater London, W4 1EA
• Catalyst Ltd
  31 Paxton Road, LONDON, Greater London, W4 2QT
• Ch2m Hill
  Ambassador House, Paradise Road, RICHMOND, Surrey, TW9 1SQ
• Chiltern Business Systems
  Unit 3 Midshires Business Park, Smeaton Close, AYLESBURY, Buckinghamshire, HP19 8HL
• Chit Chat Communications
  110 London Road, ST ALBANS, Hertfordshire, AL1 1NX
• Comsult Services Ltd
  87 Gallows Hill Lane, ABBOTS LANGLEY, Hertfordshire, WD5 0DD
• Connect B2b
  Northfield House, Northfield End, HENLEY ON THAMES, Oxfordshire, RG9 2JG
• Daly International
  New Statesman House, Stafferton Way, MAIDENHEAD, Berkshire, SL6 1AY
• Econpower Consultancies
  268 Bath Road, SLOUGH, Berkshire, SL1 4DX
• Evolution Telco Ltd
  Cressex Enterprise Centre, Cressex Business Park, Cressex Business Park, HIGH WYCOMBE, Buckinghamshire, HP12 3RL
• Feedback Communications
  Suite 33, 10 Barley Mow Passage, LONDON, Greater London, W4 4PH
• Global Telecom
  PO Box 2059, WATFORD, Hertfordshire, WD17 1XR
• Grazebrook Laboratories
  Farm Cottage, Collinswood Road, Farnham Common, SLOUGH, Berkshire, SL2 3LJ
• Hartley Communications
  104 Kingsbury Road, LONDON, Greater London, NW9 0AX
• Hays Telecoms
  The Pump House Stag Place, Town Lane, Wooburn Green, HIGH WYCOMBE, Buckinghamshire, HP10 0TT
• Head-Line Communication Ltd
  128 Park House, 15-19 Greenhill CR, WATFORD, Hertfordshire, WD18 8PH
• Intouch
  Richmond Bridge House, 419 Richmond Road, TWICKENHAM, Middlesex, TW1 2EX
• Kayeholdings.Com
  M S P House, Fourth Way, WEMBLEY, Middlesex, HA9 0HQ
• M D Telecomms
  41 Burnaby Gardens, LONDON, Greater London, W4 3DR
• M N Telecom
  17 Barham Court, Barham Close, WEMBLEY, Middlesex, HA0 2EB
• Mala Communications
  8 Beaumont Gate, Shenley Hill, RADLETT, Hertfordshire, WD7 7AR
• Mangodate Ltd
  8 Beaumont Gate, Shenley Hill, RADLETT, Hertfordshire, WD7 7AR
• Materna Communications plc
  Discovery House, Aveling Road, HIGH WYCOMBE, Buckinghamshire, HP13 6AE
• Materna Information & Communications Ltd
  Discovery House, Aveling Road, HIGH WYCOMBE, Buckinghamshire, HP13 6AE
• Mercury Energy
  1 Olympic Way, WEMBLEY, Middlesex, HA9 0NP
• Mycom UK Ltd
  Wembley Point, 1 Harrow Road, WEMBLEY, Middlesex, HA9 6DE
• New England Telephone Co
  101 High Street, TRING, Hertfordshire, HP23 4AB
• O Bit Telecom Ltd
  Abbey House, 84b Easton Street, HIGH WYCOMBE, Buckinghamshire, HP11 1LT
• Objective Communications Ltd
  Highlands Lane, Rotherfield Greys, HENLEY ON THAMES, Oxfordshire, RG9 4PS
• Olive Communications
  Tal House, 575 North End Road, WEMBLEY, Middlesex, HA9 0UU
• P T A Telecom
  Seymour House, Whiteleaf Road, HEMEL HEMPSTEAD, Hertfordshire, HP3 9DE
• Paladin Communications Ltd
  Highlands Lane, Rotherfield Greys, HENLEY ON THAMES, Oxfordshire, RG9 4PS
• Pentagon Consulting
  268 Bath Road, SLOUGH, Berkshire, SL1 4DX
• Perkins Telecommunications Consultants International Ltd
  5 The Retreat, HARROW, Middlesex, HA2 7JH
• Phone Home & Away STD Ltd
  Congress House, 14 Lyon Road, HARROW, Middlesex, HA1 2EN
• Premier 786 Services (Zimbabwe) Ltd
  54 Leagrave Road, LUTON, Bedfordshire, LU4 8HZ
• Premier Telecom UK Ltd
  54 Leagrave Road, LUTON, Bedfordshire, LU4 8HZ
• Rapid Global
  George V Place, Thames Avenue, WINDSOR, Berkshire, SL4 1QP
• Smarttalk Communications
  23 Burlington Lane, LONDON, Greater London, W4 2RN
• Stonehenge Infotel Ltd
  Churchill Court, Station Road, North Harrow, HARROW, Middlesex, HA2 7SA
• Synectiv Ltd
  Kingsbury House, 468 Church Lane, LONDON, Greater London, NW9 8UA
• System Talk Ltd
  Enterprise House, 297 Pinner Road, HARROW, Middlesex, HA1 4HS
• The Charles Douglas Organisation Ltd
  Orchard House, Church Lane, Chearsley, AYLESBURY, Buckinghamshire, HP18 0DF
• The Pride Group
  Kinnetic House The Kinnetic Centre, Theobald Street, BOREHAMWOOD, Hertfordshire, WD6 4PJ
• Unity
  214 ST. Albans Road, WATFORD, Hertfordshire, WD24 4AU
• Waves Telecom Ltd
  ST. Albans Business Centre, 1 Stonecross, ST ALBANS, Hertfordshire, AL1 4AA
• Wireplace Ltd
  128 Park House, 15-19 Greenhill CR, WATFORD, Hertfordshire, WD18 8PH