Saturday, 19:50 
Great Coastal Railway Journeys
Dunbar to Edinburgh
An epic stretch of Scottish coastline is the first stop for Michael Portillo on his new series of coastal railway journeys around the British Isles. Siccar Point, close to Dunbar on the Firth of Forth, was the site of an extraordinary 18th-century discovery and is today a place of pilgrimage for Earth scientists from across the world. From North Berwick, Michael takes a boat out into the Firth to visit Bass Rock, a breeding ground for 150,000 Northern Gannets.