I Airprox near Marham in 1971.
On my QXC routing from Cambridge to Norwich via Ely in a C150, I descended to go below a piece of cloud across my track. As I did so I looked down and saw a pair of Buccaneers pass under me well below and when I came out the other side of the cloud, saw something out of the corner of my left eye. It was a Victor, turning away from me presumably to position downwind for Marham which was about 3nm north (yes I was talking to Marham on RTF but hadn't realised my radio had failed until I tried to call them to report my sighting)