I commute daily in London and ride an electric bike. I don't leave home
without the following - helmet (full face), camera and knee pads (after my expensive jeans were ruined after a crash) and decent gloves. I've had 3 crashes in 5 years, neither of them my fault. 1) black taxi doing a classic u-turn with out looking. 2) pedestrian stepping out into road suddenly. 3) car emerged without due care(she was on mobile phone at the time)!
The most dramatic being the run in with the taxi; straight over handle bars, over bonnet and head hit the road full on. I came away pretty unhurt apart from a bruised pelvis, some discomfort which went after a couple of weeks. My front wheel was a write off, broken bar end mirrors. Cabbie paid for all repairs on the day at my LBS and then drove me home! Spoke to cabbie a few weeks later. Cost him a days earnings and £500 to repair/ replace drivers side wing! Pedestrian received a broken arm. Car driver received a police caution! NB: All my accidents were on camera, so all of them admitted fault straight away!
Anyway, to the point, I hit my head on all 3 occasions, and not one scratch or bump.
Had I not been wearing a helmet, I would have definitely come away with a busted jaw, broken nose or worse! Less we forget that when riding an electric bike you are typically averaging faster speeds than non electric bikes.
An earlier poster mentioned cars driving closer to cyclists wearing helmets. Well a couple of things I do to stop cars getting too close (this is where my bar end mirrors help) is this, if see them in the mirror in time and I think they will overtake too close(basically cutting me up) then I'll pull out to stop them. Buses are major culprits and impatient 4x4 drivers (yummy mummies doing the school run etc..). I also never hug the kerb, I like to stick to the 1.5 - 2m rule, especially on narrow roads.
I think I read somewhere that in Germany all electric bikes are fitted with a handle bar mirror by law!?!
I love having the mirrors and feel safer with them. I ride a Brompton too, but I've yet to find a decent mirror for the Brompton and as a result feel a bit more vulnerable than I do on my electric bike.