Why are lo pros good to ride round london?

Depends on your definition of city riding i guess....i love the Merckx in heavy traffic for the simple reason that it handles so quickly and has zero toe overlap which makes it great for negotiating heavy traffic...for me anyway.

city riding, as in relatively slow (0-20mph) with lots of turning and start/stopping.

I know a lo-pro should handle well at speed, I just wondered what they were like otherwise.