Rats to Riches. Lucie Skeaping introduces music spanning a hundred years from the history of Hamburg, including dances for the town band, Telemann's Water Music and - in a special recording by tenors Paul Agnew and Julian Podger , bass Stephen Varcoe and the Purcell Quartet - two cantatas composed in the plague year of 1663 by Matthias Weckmann. Producer Lindsay Kemp Repeated tomorrow 4pm