The most interesting part of the debate for me is the BMJ Rapid responses. The diversity of opinions and the people who are quoting them makes interesting reading.
Practically I'm happy to accept we can't do a proper 'trial' of bicycle helmets effectiveness in reducing brain injury or death, but we should accept that it is a personal choice to use one or not.
For all the ridiculous reasons, I think it's important off road, where the likelihood of me having an off is all down to me, but the chance of an accident on the road will be far more related to motorists, the speeds involved and blunt solid objects they will hit me with. A bit of polystyrene won't help so much then.
If all with the strongest of opinions either way would sign up for this little experiment I've got planned maybe we could come up with some answers… 😮