I met Jackson in those days too, although it was just a nodding aquaintanceship.
It certainly took me back, I went to a lot of the same venues, and met many of those mentioned, so it was a real nostalgia trip for me.
One name mentioned that I think must have been wrong, was John Martyn. I remember him in London clubs, in the late 70's and 80's, but I don't think he was around in '65. Although he was born in '48, so could have been.
Anyway apart from all my maudlin reminiscing, I heartily recommend those who missed it, seek it out on Radio 4's listen again facility. Great programme.