Just came across a lecture on the history of UK jazz by Professor Norton York who taught Denys Baptiste among others, titled “Valuing British music – Jazz futures” (2007. It is worth a read as its not too long or tough to read and, even if it is not very critical in itself, it could flag up some critical ideas after reading it:
http://www.gresham.ac.uk/lectures-and-events/valuing-british-music-jazz-futures
(posted by Kooj)