It's the Prudential Ride London Weekend
For the FreeCycle event, riders can join at any point along the route.
Routes are here.
There was a jolly nice feeling in London this morning - ah, and the air was like wine.
As I cycled around on Borisette, I met few motor vehicles. Many 'family' cycles were out, some looking as if they had been knocked up, with the right technical advice of course, in their back yard and with the entire family, including small tots, on board.
Later, when I told the shopkeepers what I'd seen, most were enthused and even entranced at the thought of loading their families onto one (or two) sturdy bike(s). There's a thought.
The Prudential Ride London Weekend "a free, family-friendly, mass participation bike ride on closed roads through Westminster and the City of London"