I have a (tentative) personnel for this as follows:
Keith Christie (tb); Sonny Rollins, Tubby Hayes, Ronnie Scott (ten); Stan Tracey (p,arr); Dave Goldberg (g); Kenny Napper (b); Phil Seamen (d) recorded at Twickenham Studios, October 18-22/25, 1965.
No 'official' recording of this soundtrack has ever been issued to my knowledge. Incidentally, the title 'Little Malcolm Loves His Dad' was actually written by Stan Tracey, but always credited to Rollins.
With regards to Rick Laird, maybe he depped for Napper on one of the above dates?
Perhaps the indefatigable Mr Spillett can shed further light on this maybe.