So good to read this thread! I played a couple of sessions that Denny was involved with, at Decca, West Hampstead, around 1971, and he really impressed me. One of the things he said was what a great guitarist Jimmy Page was. I sat in a pub with him when he was writing out a flute part for the session In D-flat!. Denny was drinking Coke, so he must have been dry. By the way, the flute player read it straight off, not a clam to be heard. In D-flat!
Denny brought an Epiphone Texan to the session - lovely guitar and sublime playing. I will always remember him as a superb musician and a very kind man.