(1988, Richard Huw, Nique Needles)

(This has also been issued as a two part TV miniseries, but I've followed IMDB in classifying it as a TV movie, albeit a long one)
Dramatisation of the race to break the four minute barrier on the running track rather wastes its two coaches, both of which are interesting.
The first is this 1936 Leyland Cub SKPZ2/Park Royal, one of eight 'deck and a half' Cubs built for London Transport for a night-time service between the major London rail termini. They were numbered C106-11, at the end of the more conventional C-class Leyland Cubs. This is C111 (CLX548), now preserved after a spell with the London Fire Brigade (many thanks to Lloyd Rich for correcting my original error):

The second is this well-known dorsal-finned Scarlet Coaches Leyland Comet CPP1/Harrington, MYA590: