Sorry if this has been posted before, I don’t make it through most of the helmet threads.
I think this TRL research is pretty even-handed and thorough. If you’ve got time to read it, it’s free but you have to login. It’s “in favour” of helmets.
I read a few things after reading a thread here a few months ago that had some thoughtful posts by LHS amongst others.
From what I can gather, there’s still a a good deal of research being undertaken about the long-term impact of ‘minor’ concussion – the type that a cycle helmet might prevent.
Seeing all the wrongly-sized, ill-adjusted helmets being worn by children I wonder to what extent they are actually protected.
I think there’s a whole area of promoting parental responsibility here rather than compulsion. Cycle more often and wear helmet!