Spotted...

The same guy as this one?

Admittedly, I don't describe him very well.

I hope it's the same guy, anyway, just because I want to think that there's only one in London, but that's probably unlikely.

Can't remember much about him but I'd definitely say the bike was a beater — dirty white road frame, possibly risers, but mainly my eyes were drawn to the gaping brake holes and freewheeling. I imagine there are more than one, and I'm guessing they are/were BMXers.