Of all the criminal rehabilitation programmes and techniques out there, joining a choir might seem rather unusual.
But Penny Smith has been hearing how singing in a group might actually contribute to keeping offenders on the straight and narrow
Heather Phillips and Jane Evans are the core of Choirs Beating Time, a charity which aims to prevent people from returning to prison.
It does this by providing employability skills, maintaining offenders' mental health, and giving them a sense of community through participation in a choir.
The duo swung by the studio to chat to Penny Smith about their work.
Heather explained how it came about: "I'd set up an organisation to get people singing at work.
"It all got a bit busy and frantic and I needed some help. Jane had just chucked her job in, so I asked her if she fancied giving me a hand.
"Then we thought it would reasonate far better in prisons."
Jane said: "At the moment, we work in four prisons.
"We go in weekly for choir sessions, open to all - prisoners and staff. We invite prospective employers to sit in on the sessions and join in.
"It brings a real community spirit and everyone gets on."