South Devon Main Line

A train on the South Devon Main Line at Teignmouth, Devon.

The Exeter–Plymouth line, also called the South Devon Main Line, is a central part of the trunk railway line between London Paddington and Penzance in the southern United Kingdom. It is a major branch of the Great Western Main Line and runs from Exeter St Davids to Plymouth, from where it continues as the Cornish Main Line. It was one of the principal routes of the Great Western Railway which in 1948 became part of the Western Region of British Railways and are now part of the Network Rail system.

Teignmouth (/ˈtɪnməθ/ TIN-məth) is a large seaside town, fishing port and civil parish in the English county of Devon, situated on the north bank of the estuary mouth of the River Teign about 12 miles south of Exeter. It had a population of 14,749 at the last census. In 1690, it was the last place in England to be invaded by a foreign power.

From the 1800s onwards, the town rapidly grew in size from a fishing port associated with the Newfoundland cod industry to a fashionable resort of some note in Georgian times, with further expansion after the opening of the South Devon Railway in 1846. Today, its port still operates and the town remains a popular seaside holiday location.