By James Gamble

A 19th-century fort on a private island is up for sale for the first time in decades - and could be yours for a mere $65,500.

Fort Darnet, on the River Medway in Kent, was first built in the early 1870s as part of an inner defensive line protecting access to a nearby dockyard.

The historic circular structure even has gun points to ward off invading enemy ships, and is only accessible by boat or kayak.

And three barges believed to have played a role in the D-Day landings in France also feature on the private island .

The fort is now up for sale for the first time in 40 years via property auctioneers Savills, with a guide price of just $65,500.

The Royal Commission on the Defense of the United Kingdom constructed the fort between 1870 and 1872 as part of an inner de

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