NSRA Club Finder
Also, e-mail the NSRA:
info (at) nsra (dot) co (dot) uk
as some clubs are so bad at advertising themselves that they won't even tick the box to allow the NSRA to list them online.
The NSRA will be able to send you a list of all the clubs in the area, as there are bound to be a few not listed on the web.
Also look at the listings for surrounding counties, as some clubs are on the borders and serve parts of the next county over, but of course are listed under the county they are in.
"A fear of weapons is a sign of retarded sexual and emotional maturity." Sigmund Freud
Shooting is my meditation