There is a relaunch of a permanent chess set in Holland Park in Kensington, and from now on there will be regular lessons on Saturdays. They have a stone board inlaid into the grass and the gardener brings out a giant set.
A pianist and composer called Jason Kouchak (see www.jasonkouchak.com) has organised it all with the council – brilliant! He can be reached on email@example.com
There’s more information here