I probably caught him before he got to that stage then Sarah. And I have since seen Chris Barber, as you say, still "cutting it"!

Incidentally, "In a Persian Market" was originally written in 1920 by Albert Ketelbey from Birmingham UK (I kid you not with a name like that!) but Acker did his Trad Jazz take on it.
While looking for Blind Willie Johnson's song "Let the Light from the Lighthouse" recently on Youtube, I also came upon a Trad Jazz version from Acker. (Can't find it again now!)