You might want to pm TRC
(Sorry, been away (working))
I was at Mann's from 1974, but I can't shed any more light on AM's early days.
I knew Gay and Roly from my days at Battersea 1972-74. I also remember John Dicken.
I also remember the bitter (seemingly one-way) feud between Air Gregory and BEAS - never got to the bottom of it. The AG boys (MS & BB) seemed to HATE BEAS with a vengeance.