It's based around scenes shot on his three-year world tour and accompanied by road-trip footage showing his first visit to the Italian beach where his father died during World War II.

Waters tells Rolling Stone: "I've never tried to visit, because my father's body was never found. I never really knew the circumstances of his death in any detail.

"We'd been in southern Italy, filming in the memorial garden at Cassino - a lot of people gathered, including a news crew. A British expat named Harry Shindler, living in Italy, saw it on his TV. He went, 'I might be able to help that person.'