Every day, on a sandy beach or a rocky foreshore, fascinating evidence of Britain's island history appears and disappears as the tide rolls in and rolls back out again. Tori Herridge and Alex Langlands reveal stories from our extraordinary maritime, industrial and natural history. In this episode, Tori and Alex explore Lancashire's coastal archaeology. They investigate a beach full of building rubble from World War II, track down Liverpool's own version of the Whisky Galore story, and find evidence of people and animals dating back 7000 years.