There was a comment in the discussion about Wiggins' accident that many people were not aware of existing cycling campaigns. Here's an example of a simple thing you can do, if you are interested:
Early Day Motion 407 has been tabled in support of British Cycling's call for a justice review:
http://www.britishcycling.org.uk/campaigning/article/cam20121101--86-MPs-support-our-justice-review-campaign--but-more-are-needed-0
You can write to your MP and ask them to sign EDM 407 (if they have not already done so - check the signatories here: http://www.parliament.uk/edm/2012-13/407)
It is really easy to contact your MP by email using Write to Them: http://www.writetothem.com/
Keep it short, specific and polite; there is a letter template on the BC website if you would like some ideas about what to write:
http://www.britishcycling.org.uk/zuvvi/media/bc_files/campaigning/member_letter_template_MPs_August_2012_FINAL.doc