Try this Google search, here are some recent results:
Music.com article
Artist Direct has tried with an article by Stewart Mason and a review of the Professor Slack 10" EP.
Another collection of reviews of Le Disque du Crepiscule artists.
A related article by Andy Blake mainly about Man Jumping, from his book.

Listen to Rise & Fall from Professor Slack 10" EP [OPT011], performed by Lost Jockey, recorded and produced by John Leckie in Studio 2 of Abbey Road recording studios. This music was used as signature tune to BBC Radio 4's Puzzle Panel.

Prior to the 10" EP for Operation Twilight was the LOST JOCKEY 12" LP [TWI 062] produced and recorded by Gareth Jones at Wortwell Mill in Suffolk and the London Film Co-op and released by Le Disque de Crepiscule.