Remember kids... always wear a helmet. (The almighty bikeradar helmet thread)

Monster helmet article on the Guardian today: https://www.theguardian.com/lifeandstyle/2017/mar/21/bike-helmet-cyclists-safe-urban-warfare-wheels

Sums the debate up pretty well. Very comprehensive. Some interesting findings in the various studies. This one particularly:

In contrast, the tabard saying “polite” saw the nearest average overtaking distance and almost twice as many potentially dangerous passes as “police”.