Reading this thread again has me thinking about the two McLean gigs I saw. The first was with his 'Hartford' sextet with Rene, Steve Davis and Phil Bowler. The second, at the Jazz Bakery, had Jackie with Cedar Walton, David Williams and Billy Higgins.
I can remember when he played the Camden Fest around 1980 John, at the Shaw Theatre - and it got rave reviews at the time. Unfortunately I was away from London and couldn't take advantage.