Wasn't that the RFH as part of the re-opening season after the refurb? I was at the concert and certainly remember it as there but memory's a slippery friend. Recordings of the whole gig are out thre if you know what to search for...
He also played with Bill Dixon and Tony Oxley at RFH, don't recall the year. Solos from all three before duets and a final trio. Dixon used lots of effects. Startlingly good
My memory is that on both occasions, buet certainly the quartet date, Cecil entered dancing and reciting before sitting at the piano. Magical