According to 'Cliff Richard - The Complete Chronicle' by Read-Goodall and Lewry that 21 September 1966 session did include the following:
21 September 1966
ABBEY Road
Film soundtrack recordings for Thunderbirds are Go!/Studio Session
Thunderbirds Theme for Thunderbirds are Go EP
Zero X Theme for Thunderbirds are Go EP
Lady Penelope for Thunderbirds are Go EP
Never Knew What Love Could Do(5) for La La La La La EP
La La La La La (2) Unissued
One Fine Day (3) unissued
I Saw Her Standing There (6) for Don't Stop Me Now
Lead Vocal: Cliff Richard
Guitars: Hank Marvin/Bruce Welch
Bass: John Rostill
Drums: Brian Bennett
Orchestra: Mike Leander
Engineers: Peter Vincent/Richard Lush
Recorded in: STudio 2
Session Hours: 2.30pm-5.45pm (Shadows)/7.00pm-10.15pm
Now, as for 'Solitary Man' the version released on the LLLLL EP was recorded here:
11 October 1966
ABBEY Road
Sudio Session
One Fine Day for Don't Stop Me Now
You Gotta Tell Me for Don't Stop Me Now
Things We Said Today for La La La La La EP
It's All Over- A side
La La La LA LA for La La La la La EP
Solitary Man for La La La La La EP
Lead Vocal: Cliff Richard
The Bernard Ebbinghouse Orchestra
Vocals: Hank Marvin/Brice Welch
Producer: Norrie Paramour
Engineers: Peter Vince/Richard Lush
Recorded In: Studio 2
Session Hours: unknown
Hope that helps.
Regards
