The Transports is a ballad opera telling the true story of two convicts who fell in love in prison as they were waiting to be sent on the First Fleet to Australia. They had a child, were cruelly separated, but thanks to a kind gaoler, were eventually united. It was recorded in 1977 by giants of the folk world - June Tabor, Nic Jones, Martin Carthy, Norma Waterson. 40 years on a new generation of folk stars - Nancy Kerr, Faustus, the Young'Uns - are touring their new production. Samira meets them as they rehearse and finds The Transports has plenty to say about exile and migration today.