dmg, Kavanagh QC doesn't help, I'm afraid. I'm presently playing the ORIGINAL MASTERS programme with Pink Floyd as a theme - it started with "See Emily Play" (my time period for Floyd), with tracks by Pink Anderson and Floyd Council and, at present, a discussion with Glen Povey, who wrote a book about early Floyd. What else will come on, I wonder. The programme is mainly about Syd Barrett but there are other (non-Floyd) artists's tracks interspersed here and there.
jbaent, there are probably some DS/MK recordings but nothing you won't have already. I did see the 1997 broadcast of MK's Bristol concert in 1996, for example.
I'm currently thinking about which of all these cassettes to transfer on to CD and then I'll decide how to do it.