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.

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

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.