There is the Maker Fair in Newcastle on the 12/13 March this year.
There are plenty of people hacking and messing with Arduino up here, but we're probably not organised to have met or set up a mailing list. I can point you in the right direction to a few people, but not events. Find me on twitter with this username.
If there's enough interest we can organise a regular Arduino (or any maker activity) get together / project session. Reply here if you're interested or PM me and we'll see if we can organise something .
for the north east as i live in Teesside *Coughs* and there seems to be a gap from Leeds to Newcastle.
Surprisingly enough mowcius there are and i know some of them.
Any one panning anything over the next couple of weeks? PM me or post here. It would be good to get an active community for Arduino etc going in the area.