yes, it's very rare, even for
felix aeppliIn the late sixties Jonathan played many small gigs in and around London before he got his break.
One night in 1969 he was playing in a restaurant when in walked Colin Petersen, formally a member of the Bee Gees. Colin became his Record Producer.
The 1970 single 'Make a Stranger Your Friend' include a choir that includes the Stones’ Mick Taylor, Klaus Voorman, Madeleine Bell, Carl Wayne, Peter Sellers and Spike Milligan
maybe
nico zentgrafis willing to help you out .....