On the Fact that London Police Are Instructed to NOT Pursue a Criminal if He's Taking Off On a Moped While Not Wearing a Helmet - http://www.dailymail.co.uk/news/article-3101028/Take-helmet-police-won-t-chase-Scotland-Yard-reveals-lets-motorbike-crooks-away-die-fall-off.html

So break the law (by not wearing your damned helmet) to break the law (robbery, battery, etc.), in other words. Yeah, those British really got a handle on it, don't they (with this particular edict coming straight from the pea-brain of Theresa May herself, I've heard - love it!!)?