As front line public services face drastic austerity cuts, the dithering Kelly Commission is proposing to introduce state funding for political parties - an option pushed hardest by the Liberal Democrat's which is otherwise hardly viable as a nationwide political force:
http://www.guardian.co.uk/politics/2011/oct/28/political-parties-more-state-funding For background information on UK party membership read:
http://unisonactive.blogspot.com/2010/07/inexorable-decline-in-membership-of-uk.html