Then it’s on to London, where Ono met the movers and shakers of Swinging Sixties counterculture — including, fatefully, Lennon, who came to see her show at a London gallery.

At last Yoko Ono is being acknowledged in Britain as a major avant garde artist in her own right. It has been a long wait; last year was her 90th birthday! The problem, of course, was her relationship ...