There's a girl at work who swears by her dentist in the North. This dentist gets so much business from the South, that as part of the 'service' they will collect you from the train station, and drop you back after your treatment. Apparently the price up there is considerably less than what you'd pay here, and the treatment is excellent.
I can try and find out the dentist name/number for you when I'm back at work on Tues... if you're still interested, PM me.
-soc