Certus Technology Group
- Hemel One, Hemel Hempstead, Hertfordshire HP2 7YU London, UK
- 03333 708 090
IO Mart
- 11-21 Paul St Shoreditch London EC2A 4JU
- 0141 931 6400
Server Space
- Ground Floor, 11-21 Paul Street, London, EC2A 4JU
- 0207 129 7005
Backbone Connect
- 10 Dominion Street London EC2M 2EF
- 44 (0) 203 9557 999
Claranet UK
- Claranet, 21 Southampton Row, London, WC1B 5HA
- 0330 134 7201
