Yesterday was the centenary of Merce Cunningham’s birth. We went to the celebratory Night of 100 Solos at the Barbican – an astonishingly visually exciting, abstract, composite performance, with Dada-ist backdrops by Richard Hamilton, organised by dancers from Cunningham’s company, including Siobhan Davies.

I had not realised how important London was to an appreciation of Cunningham when his Dance Company performed at the Phoenix Theatre in 1964, the year that Rauschenberg won the Golden Lion at the Venice Biennale. All will be revealed in Alla Kovgan’s forthcoming 3D film.