Why Cycle UK
A good site and a good piece on the pro’s and cons of bicycle helmets.
[…] Cycle helmets are only designed and tested to withstand an impact equivalent to an average weight rider travelling at a speed of 12 mph falling onto a stationary kerb shaped object from a height of 1 metre. Helmets are not tested nor expected to be able to offer full protection if you come into contact with a vehicle which is moving. […]