Not entirely accurate, no. But then, was I any less accurate than MrIca claiming a Network Rail GSM-R mast was a Vodafone mast with BT "fibre" telegraph wires?
The EE deal is managed by MBNL and includes Three:
http://www.mobiletoday.co.uk/news/in...with-MBNL.aspx
O2 do indeed have deals in place with both BT and VM. Both are for 10 years from 2013.
http://www.mobiletoday.co.uk/news/in...Media-bid.aspx
I forgot about Vodafone, indeed they're the odd ones out using their own ex-C&W network where available, but still sharing backhauls with O2 elsewhere.