Downes did an LP on Vertigo with that group, also reissued on CD but might be hard to find.
He’s also in a similar setting on the Ray Russell Rock Workshop ‘Street War’, accessible via ‘Jazz In Britain’’s Bandcamp site.
Bob Downes by the way lives in Germany - and has a site where you can buy some of his CDs, much of it with smaller groups.
One masterpiece to check out is John Warren/John Surman ‘Tales of the Algonquin’ on Deram. That one has also been reissued on CD, most recently on Vocalion.
A number of years ago I was fortunate enough to see Surman perform this superb suite with a local youth big band, trained up by John Warren. Board member Alex Hawkins was on piano. A memorable night !
Lots of Mike Westbrook CDs, films and articles to check out on the ‘Westbrookjazz’ website. Well worth spending an hour or 10 on there.