For his One to One series, Sir Trevor McDonald explores the idea of redemption, talking to two very different people with very different ideas on what it means.

This week a former maximum security prisoner talks about finding redemption through sport. Former armed robber John McAvoy once shared a wing with convicted terrorist Abu Hamza in Belmarsh Prison. His life was going nowhere but then he discovered rowing in the prison gym and went on to break the world record for indoor rowing. Now he's a semi professional tri-athlete seeking to inspire other young people who risk becoming offenders.

Producer: Maggie Ayre.