Documentary which sees David Dimbleby tracing the crucial importance of the sea to Britain's trade and to individual livelihoods of coastal communities.

David Dimbleby explores how the sea emerged as a source of pleasure, Punch and Judy and sand sculpture, before docking into Greenwich.

David Dimbleby sails the south west coast of England, exploring maritime art, architecture and history - including the story of Sir Francis Drake.

David Dimbleby continues his voyage round Britain, sailing along the south east coast from Hampshire to Kent - the edge of Britain essential to its defence.