Hannu Lintu, Aurora Orchestra and She'Koyokh, Radio Reunited, John Law Trio
Sean Rafferty's guests include members of acclaimed innovative UK chamber orchestra Aurora and She'Koyokh - described by Songlines magazine as 'Britain's best Klezmer and Balkan music band'. They are preparing for a unique collaboration inspired by the Jewish folk-influenced music of Mahler at London's LSO St Luke's - and they play live in the studio.
At 5.33pm we are joining Simon Mayo at the Science Museum, along with every BBC radio station in the UK, for Damon Albarn's Radio Reunited, a new piece celebrating the 90th anniversary of the BBC.
Also in today's show, rising star conductor Hannu Lintu - recently appointed Chief Conductor of the Finnish Radio Symphony Orchestra from 2013/14 season - in the UK for concerts with the London Philharmonic and Royal Liverpool Philharmonic.
And as the 2012 London Jazz Festival continues, there's exclusive live music from the John Law Trio.
Main headlines are at 5pm and 6pm.