There's often an openstreetmap session and mapping party going on amongst the talks, so anyone around Farnham in Surrey who's curious, might well be worth coming along. There's limited space in the hall, but maybe a separate group could meet outside too - its got a good sized car park and there's plenty of greenery, and also they're planning a proper "camp" nearby and a lunch/nice time in the park just over the road alongside the river (in the main town bit still, not the far side of South St.)

http://www.oggcamp.org/

I helped organise a Farnham mapping party a couple of years ago, to fill in many of the missing roads outside the immediate town centre, which really made a difference. But there's still more could be done.