Hi Richard,
Welcome back to two wheels and the A7/A10 Forum.
Ok, I'll try to answer your questions.
Ray Baker is still kicking about although not riding his outfit as much as he used to. He still has his R3 with widened Watsonian sidecar which he has rigged up with caravan reversing gear. Unfortunately I don't have a contact number for him but I should be able to get in touch with his son, Dave. If I get any more information I will send you an email.
Stan Pollock left the UK and went to live in Thailand for a while. He was there for a couple of years before he returned home. When he first came back I saw him a couple of times and then he seems to have left the scene. However, he might see your posting and get in touch with you.
John Hewitt and Pat Quinlan won't be able to get in touch with you. Unfortunately they both passed away towards the end of September, within a couple of weeks of each other. I attended both funerals and the send off they had showed how popular they were. I was surprised that I didn't see Stan at either of the services but I reckon that maybe nobody knows how to get in touch with him.
Sorry to be the bearer of sad news.
BTW:- I might be on that video of yours. Look out for a B31 with registration number 25 CUP.
Beezageezauk.