Love the new OFCOM Sitefinder mapping - I find that T-Mobile and 3 share a mast 150M from the house, also that O2 have set up a UMTS mast a similar distance (which begs the question why I continue to have so much difficulty picking up 3G from a mast that is ~150M from the settee (no matter which phone I pop the SIM into)

Shame on the other operators for not collaborating. I think it is time for them to, yet again, be regulated kicking and screaming all the way!! This has got sod all to do with commercial competition, this stuff is national infrastructure and the sooner these companies started thinking like that the better!