I'm in North East England - Newcastle.
I'm desperate to meet others locally, there is a local group but I've yet to go as I'm a new member and next months meet is at a bowling ally rather than the usual place so a bit too uncomfortable for me. It's via NAS so a closed-group thus I'm not going to post details, but I will say that The National Autistic Society is the place to go for UK aspies and autistic folk looking for local groups.
I would imagine that most local groups would not allow people to just turn-up, they'll either be run by autism organisations who would be tight about protecting vulnerable members, or even more casual groups may be a bit funny about new people turning-up as existing members may be vulnerable, fussy, awkward...I'm going by what I've heard from others who run such groups and the general drama us lot can cause, lol. Just a point to consider.
_________________
Bloodheart
Good-looking girls break hearts, and goodhearted girls mend them.