As I go round doing my presentations, I get the chance to visit quite a number of local astronomy groups.
I was planning to put together a list myself, but the Web site accessed from the link below is so good, I won’t be able to emulate it without putting in an awful lot of work.
www.astronomyclubs.co.uk/Clubs/Counties.aspx
The Federation of Astronomical Societies also has a list of their member groups:
fedastro.org.uk/fas/members-by-county