Here's a link to the Bell Metropolis helmut that I've just bought. I got it at Comptons Cycles down at Catford. I buy my Schwinn's elsewhere as they don't stock them but get Comptons to do the repairs. They've got some top-notch cycle mechanics in there.

I think it kinda looks like the helmut that Luke Skywalker et al wore on the Moon of Endor when they were riding those Speeder Bikes through the forest. I'm gonna tie my ragdoll cat, Blue, to the back of the bike so it looks like I'm being chased by an Ewok.

Those guys were lucky as they only had to contend with Imperial Storm Troopers and not the London South Circular like we do.