Just got back from the Corsham Sci-Fi convention with my brother, nephew and sister-in-law. It was fun! Danny John Jules and Chris Barrie were there (Red Dwarf) but the queue for them was way too long - besides, I don't really want to meet people, gawping is fine - and so was Colin Baker.
In fact, there were a lot of Doctor Who cosplayers and stuff there. A half-decent David Tennant lookalike, an excellent Matt Smith, Daleks, Cybermen (old and new) a couple of full sized TARDIS, even one girl dressed as The Girl in the Fireplace (nowhere near as hot as Sophia Myles). They even had a couple of original props there, including a statue from the episode Blink and some of the Adipose creatures.
It was a pretty small place and not a whole lot to do past an hour or so, but it was nicely run, incredibly well attended, and had some decent stalls.
I think we all enjoyed it enough that there's another convention in a couple of months. This one has Caroline Munro attending!