BT Retail ( www.bt.com)
BT Wholesale ( www.btwholesale.com )
Cable & Wireless ( www.cw.com/uk/ )
Carphone Warehouse ( www.carphonewarehouse.com )
Colt Telecom ( www.colt.net )
Easynet/Sky ( www.easynet.net or www.sky.com )
Everything Everywhere (Orange/T-Mobile) (http://everythingeverywhere.com)
Gamma Telecom (www.gammatelecom.com)
Openreach (www.openreach.co.uk)
VirginMedia (www.virginmedia.com)
Vodafone ( www.vodafone.co.uk )
Babcock Networks (www.babcock.co.uk)
First Mile Networks Ltd ( www.firstmilenetworks.co.uk )
Global Crossing (www.globalcrossing.com/ )
Hutchison 3G (Three) ( www.three.co.uk )
Independent Fibre Networks Ltd ( www.ifnl.net )
O2 ( www.o2.co.uk )
Verizon Business ( www.verizonbusiness.com/uk/ )
Federation of Communication Services ( www.fcs.org.uk/ )