Once again, we follow Britain's national treasures Prunella Scales and Timothy West as they navigate their way through some of the most beautiful and challenging canal routes in Britain and Europe.

Along the way Tim and Pru meet the local characters who live on, work on, or just enjoy the canals, and witness first-hand how canal life has changed over the years.

Journeys include:

• The Wey and Arun - London's lost route to the sea
• Birmingham to Braunston
• The Shannon-Erne Waterway, Ireland
• The Göta Canal, Sweden
• Stockholm and the Archipelago
• Stratford-upon-Avon