Whooppee!   A new helmet debate.
 
I, for one, never wear a helmet in London.  I wear one occasionally (training with middle child who disapproves of non-use or on fast rides in the Malverns).  In London - never.
 
I lived there all my life until going all rural a few years ago.  It never occured to me to wear one, although they were becoming popular before I left the Smoke.
 
I've been bowled over by traffic many times in London, fallen unassisted more than once and have a history of treating Euston Road as my own, private Rollerball track.  But I've never bumped my bonce.
 
Even my pro-helmet middle child goes helmetless when we ride together in the Smoke.
 
I like to think I take my own longevity (relatively) seriously, but for me helmets in urban traffic are just something else to carry when you get there.
 
I have statistics to prove everything I've written here, but I left them in my other trousers.
 
Anyone who disagrees with me is wrong.  Anyone who even raises a slightly critical eyebrow to any of the above is a moral coward, a cretin, a buffoon and a scallywag (in the current rather than historical sense).