John “Hoppy” Hopkins is a modest cultural icon whose career has taken many unexpected twists. A nuclear physicist in the Fifties, a documentary photographer, writer and co-founder of the legendary UFO Club in the Sixties, he is known today mostly as a pioneer of video. But now he returns with photographic records from 1960‑66, covering that seismic transition from post-war austerity to the new politics of peace and counter-culture.

Hoppy was a documenter for the Sunday Times Magazine and Melody Maker, covering CND marches, London’s psychedelic drug culture, American civil rights and jazz legends and future British pop stars.

His informal portraits include a pensive close-up of Malcolm X and Thelonius Monk spraying notes, an eye for detail and humour in the besuited anti-nuclear protesters marching with face-painted psychedelics, and candid moments with shockingly youthful Lennon, McCartney and the Stones, and Allen Ginsberg, animated as a preacher, at the Albert Hall’s debut Poetry Olympics, 1965.

This slice through Britain’s fast-changing landscape also includes “Old London” — realistically drab vignettes matching Bill Brandt’s Thirties documentary, which position silent men in a dole queue and kids playing near bomb-sites against modernist council flats announcing the New Era.

After decades of being associated with video, this exhibition reminds us of Hoppy’s significance in Britain’s photographic, political and cultural history.

Until 19 July. Information: www.ideageneration.co.uk