Christopher was interviewed about his performances of Handel's opera Flavio with the Academy of Ancient Music for Radio 3's 'In Tune' programme on 14 April. Extracts from the opera were sung by the soloists who sang at the performances in Birmingham (15 April) and London (17 April).
It is possible to listen to the programme for up to 7 days after broadcast via the BBC's Listen Again service. Click here to be directed to In Tune.
[Picture credit: Hulton Archive/Getty Images]