Was that Jamie Cullum this morning on R4 ?
Sounded like a jolly self effacing sort of bloke - bit more of a Thelonious Monk sort of bloke - went to Ronnie's in the mid 60's to see him, along with The Soft Machine.
Turned out that T.Monk had gone for a wander round Soho, and totally forgotten he was on at Ronnie's.