A few links that you may find useful ...
Liberty
http://www.liberty-human-rights.org.uk
UK organisation with the tag line : 'protecting civil liberties promoting human rights', Liberty gives information about current issues, such as ID cards, punishment without trial, deportation, ASBOs, free speech and so on. Some criticize it for presenting loudly the 'soft left' political angle of Western liberal society, some perceive them as too libertarian, while some feel their perspective is crucial to sustainable honourable culture.
Up My Street
http://www.upmystreet.com/commons/l/
Using a UK postcode, you can find your MP together with contact details.