Complex sentence: He became a key figure in the development of British Jazz, producing several big band records with the newly formed Mike Westbrook Concert Band between 1967 and 1969 for the Deram label, featuring such musicians as Surman, Mike Osborne and Harry Miller.
Split into simpler sentences: He became a key figure in the development of British Jazz, producing several big-band records for the Deram label, with the newly formed Mike Westbrook Concert Band, between 1967 and 1969. These featured such musicians as Surman, Mike Osborne and Harry Miller.