Usefull site for finding your local transmitter when tuning your DVB input source and location

http://www.wolfbane.com/cgi-bin/tvd.exe?

Will tell you your local transmitter station and help when scanning for channels (Scanning All Channels/All reigons can not help at times)
There is also a list of Analog channels as well if you need it

http://www.wolfbane.com/cgi-bin/tva.exe?

Hope this helps

For further info there is also the information on the UK freeview switchover (when Analog channels like analog BBC 1 are going to be switched off - dont panic got a few years left yet and time of post)
Link here
http://www.wolfbane.com/cgi-bin/tva.exe?