• A Office Response
  11 Mill Street, SLOUGH, Berkshire, SL2 5DH
• Advanced Telephone Systems
  Willoughby House, Willoughby Road, HARPENDEN, Hertfordshire, AL5 4PF
• Globility Ltd
  3 Hatchers Mews, LONDON, Greater London, SE1 3GS
• Imsmart
  Unit 13 Herts Business Centre, Alexander Road, London Colney, ST ALBANS, Hertfordshire, AL2 1JG
• Itv plc
  200 Gray's Inn Road, LONDON, Greater London, WC1X 8HF
• Jays Enterprises Ltd
  1 Peckham Park Road, LONDON, Greater London, SE15 6TR
• Mirror Audio Ltd
  10 Broadbent Close, LONDON, Greater London, N6 5JW
• Multipart Ltd
  9 ST. Ronans Close, BARNET, Hertfordshire, EN4 0JH
• Network
  57 London Road, ENFIELD, Middlesex, EN2 6DU
• Orange P C S
  276 Chiswick High Road, LONDON, Greater London, W4 1PD
• Rika Telephone Equipment
  170-172 Honeypot Lane, STANMORE, Middlesex, HA7 1EE
• Smart's Communications
  6 Upton Lea Parade, Wexham Road, SLOUGH, Berkshire, SL2 5JU
• Synergyone
  Unit 3a The Old Print Works, Tapster Street, BARNET, Hertfordshire, EN5 5TH
• Telsave Ltd
  27 Atwood Road, LONDON, Greater London, W6 0HX
• The Carphone Warehouse
  67-68 Queensmere Centre, SLOUGH, Berkshire, SL1 1DD
• The Carphone Warehouse
  80 High Street, LONDON, Greater London, W3 6QX
• The Fone Exchange
  14 Hendon Lane, LONDON, Greater London, N3 1TR