This week Derek Jewell plays long extracts from Escalator over the Hill, a two-hour narrative work in mixed styles, by Carla Bley and Paul Haines , featuring GATO BARBIERI (tenor sax), ROSWELL RUDD and JIMMY KNEPPER (trombones), JOHN Mc -LAUGHLIN (electric guitar), JACK BRUCE (bass guitar and voices), CARLA BLEY and MICHAEL MANTLER (keyboards), LINDA RONSTADT and many other leading musicians: records