There are less obvious factors as well. There is evidence to suggest not only that (for whatever reason, and the cause/effect may go either way) unhelmeted riders may be less likely to have an accident, but – perhaps more significantly – that motorists are more likely to give unhelmeted riders more room, thus reducing the likelihood of an accident
I did read a study about that a while back. Seems slightly bizare in a way think, the car driver mindset of “he’s wearing lycra and helmet so must be a good cyclist, he won’t mind if i brush past him and nearly knock him off then”..
Didn’t know this topic had been done mucgh before which it sounds like it has going by the responses! It just got to me when i saw it.. the child doesn’t have a choice.