Royal Military Canal

The Royal Military Canal stretches for 28 miles between Seabrook near Folkestone and Cliff End near Hastings. It follows the old cliff line bordering Romney Marsh and was built in 1804–09 as part of Britain’s anti-invasion plans against Napoleon. Lieutenant-Colonel John Brown designed the canal to block a French landing near Dungeness, which would have given them a direct route to London. William Pitt the Younger and the Duke of York backed the scheme, and John Rennie served as consulting engineer. Construction began at Seabrook in October 1804 and finished in April 1809 at a cost of £234,000. The canal was never used in battle but helped control smuggling after the Napoleonic Wars. Guard houses were built at each bridge, though some guards took bribes. A barge service once ran from Hythe to Rye, but the canal fell into disuse by 1877. During the Second World War, the 31st Independent Brigade Group fortified the canal with pillboxes and barbed wire. German invasion plans included seizing crossing points on the first day of an attack. Today a public path runs the full length of the canal, part of the 163-mile Saxon Shore Way. Walkers pass WWII pillboxes, acoustic mirrors, historic towns like Hythe and Rye, and medieval churches such as St Rumwold’s. The canal supports wildlife including kingfishers, dragonflies, and marsh frogs. It also helps manage water levels on Romney Marsh and Walland Marsh. The path offers views of the waterway and its surroundings, linking military history with natural beauty.