Realistically how would they enforce compulsory helmet wearing though? Around here I very rarely see a copper, and I doubt any of them would stop me in their car if they saw me. So i'd probably just carry on as normal cycling without a helmet to work and take my chances. I usually wear a helmet, but the rebel in me would refuse to wear one if they were made compulsary. What would they do? Fine you about £30? I could afford the odd £30. What would they do if you were a regular helmet flaunter, send you to jail? 
