North Wales was a region of Wales. The Death Zone on Gallifrey was about the size of North Wales, though Gallifreyans believed it covered a great distance. Both Iris Wildthyme and the Doctor knew this. (PROSE: The Scarlet Empress [+]Paul Magrs, BBC Eighth Doctor Adventures (BBC Books, 1998).)
The iron constituting one guerilla's ray gun was originally mined in North Wales. (TV: Day of the Daleks [+]Louis Marks, Doctor Who season 9 (BBC1, 1972).)
Wrexham and Llangollen were in North Wales. (AUDIO: Forgotten Lives [+]Error: Code 2 - no data stored in variables, cache or SMW.)
Lord Mayor of Cardiff Margaret Blaine was aware of the "notorious divide" between North and South Wales, joking in September 2006 that she had no desire to re-open it in light of Blaidd Drwg. She did point out that, although Trawsfynydd had been mothballed, North Wales still had Wylfa, so a nuclear power station in Cardiff would "[make] the score one-all!" (PROSE: The Western Mail [+]Doctor Who online fiction (BBC, 2005)., TV: Boom Town [+]Russell T Davies, Doctor Who series 1 (BBC One, 2005).)