Which mobile phone service providers use which networks?

mh1923

I tried searching the forum here, and googling, but I've had no luck. What I'd like it to know which mobile phone providers have actual networks, and which do not. And in the case of the latter (Like Virgin or Tesco) which network do they use?

I thought I remembered seeing a page somewhere that had it explained, but I can't find it now.

Thanks!

gaming_guy

virgin use tmobile
tesco use o2
asda and bt mobile use voda (i think)

easymobile used to use tmobile before they disappeared