The WSM show is held by the southern club. If you drop the secretary an e-mail I am sure she would let you know the address. Everyone is welcome to go and have a look and there are usually raffles, tombolas and tea & snacks on sale as well as hamsters, or why not take your hammie for the pets class which is 'enter on the day' and is usually judged around lunch time. We were made very welcome first time we went and everyone just loves to talk hams! We are members of Northen and enjoy it very much. You soon get roped in to helping and its great to meet lots of people and their lovely hams. You also get a monthly journal and schedules for the shows so it is worth £8.50 a year.
Here is a link the the NHC with show dates
The secretary is at the top
http://www.hamsters-uk.org/shows07/shows07.html