Geoff is in the middle facing the camera and the posterior on the far right, elbow raised pumping up a tyre, belongs to me. Not that I recognise my own bottom, but the bike is definitely my Cleland No.10 with its small gray Carradice panniers and circular Ever Ready rear light. Back then I lived in London and needed lights to cycle home from Harrow on the Hill Station.
I checked my diary and this was most likely the 5th of July ride almost exactly 25 years ago. "Pub stop/lunch at Fox Dunsmore. Too much cider."
I can still recall how amusing it was to ride off-road in a slightly inebriated state. And wondering whether it was illegal to be drunk in charge of a bicycle on a bridleway?