I found this picture on the Norfolk and Suffolk Aviation Museum website under the title of "Visiting bikers".
We had a little jolly out to there on Sept 13th.
It's my mate Syd, Dacs, Me, Grumpy and DaveR. We were told to look interesting, standing in front of a super sports Hillman Hunter with Holbay engine and Sydney cams.
Glorious day and smashing museum.