Plot: Angela Rippon introduces the St Thomas Wake: Foxtrot for orchestra by Peter Maxwell Davies and talks to him about this entertaining and unusual piece, in which a jazz band rubs shoulders with a symphony orchestra and an Elizabethan Pavane is transformed by the sounds of 1920s dance music. The programme begins with Alfred Brendel as soloist in a work equally original in its departure from tradition - Beethoven's Piano Concerto No 4 in G