Bit slow. Sure you weren't on ya MTB?
Not a single closed road and through the very busiest roads in London on a busy tourist Sunday afternoon. Was mental. I'm amazed we got even that as an average speed. Managed to get over 30mph at one point. But first hours through places like Westminster, Whitehall and Trafalgar Square were crazy.
I was only messing anyway but :O It was on open roads! That is mental... no chance I'd have done that.
Was great when at one point the organisers put a right turn arrow at a no right turn junction!