Mark Hudson explores how a radical London arts charity taps into something that has been going on at grassroots level for 40 years.

This archival album highlights a session by the trumpeter’s sextet from May 1958, a year before the recording of ‘Kind of ...

52 x 38 1 ⁄ 2 in. (132.1 x 97.8 cm.) 38 1 ⁄ 2 x 52 1 ⁄ 2 in. (97.8 x 133.4 cm.) ...