Fixie Bikes

[Grahamm]

They cycle partly to increase/maintain fitness so this will help.

Clearly you don't cycle...

And, yes I've ridden in London, but as I also cycle, I know that sometimes cyclists have to make sudden changes of direction to avoid pot holes, broken glass and other crap on the road, so I give them plenty of room, just as the Highway Code says (which, BTW, includes motorcycles...)

Rule 213

Motorcyclists and cyclists may suddenly need to avoid uneven road surfaces and obstacles such as drain covers or oily, wet or icy patches on the road. Give them plenty of room and pay particular attention to any sudden change of direction they may have to make.