Cynthia Payne,
I went to many many parties at Ambleside Avenue, Streatham, SW London, and also pre-party 'bunk-up' nights as she called them.
But I also met her in in a little flat in London W1, I think it was Hallam Street, near Great Portland Street but I cannot now remember her 'trading name'. This was before and then alongside the parties when she was still younger and succulent. It must have been the very late 1960s or early 1970s.