Following the 12-strong crew from Llangrannog rowing club in Ceredigion as they prepare and compete in sea-rowing race the Celtic Challenge across the Irish Sea from Arklow in the Republic of Ireland to Aberystwyth. The eight women and four men, including three grandmothers, a fire officer, a police inspector, a builder, a veterinary nurse, a foster carer and a student, all pull together for nearly 100 miles of open sea that can take over a day to cross. Dot Davies narrates.