All around the UK, in rivers and streams, and in the mud on the side of riverbeds are the remains of our maritime past, which helps us understand who were are today.

In 2013, a survey around the UK identified 199 different assemblages of hulks, remains of craft. These included paddle ships, ferries, steamboats, sail ships, submarines and fishing boats.

In this stunning documentary historian and archaeologist Dr Sam Willis travels along the River Dart, from Totnes to Dartmouth, to explore the wreckage of ships of our maritime past.