Ukfree.tv - check TV reception in your area. This website has tons of other useful information.
http://www.dtg.org.uk - The Digital TV Group (DTG) is the industry association for digital television in the UK. The Group publishes and maintains the technical specification for the UK's Freeview and Freeview HD platforms.
Ofcom Television Transmitter Location Maps - These maps detail the locations of all of the transmitters within broadcasters’ regions. The maps have been published to provide guidance for industry and viewers on when switchover is going to happen in a particular area.