• A Office Response
  11 Mill Street, SLOUGH, Berkshire, SL2 5DH
• Advanced Telephone Systems
  Willoughby House, Willoughby Road, HARPENDEN, Hertfordshire, AL5 4PF
• Imsmart
  Unit 13 Herts Business Centre, Alexander Road, London Colney, ST ALBANS, Hertfordshire, AL2 1JG
• 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
• Telephone Systems
  18 Laburnum Way, STAINES, Middlesex, TW19 7SQ
• The Carphone Warehouse
  67-68 Queensmere Centre, SLOUGH, Berkshire, SL1 1DD
• The Carphone Warehouse
  80 High Street, LONDON, Greater London, W3 6QX