Fort Horsted is a Schedule Monument (Monument Number 416040) that lies in the Horsted Valley to the South of Chatham, Medway. It is a late 19th Century Land Fort, and one of six constructed around Chatham and Gillingham to protect HM Dockyard Chatham from attack. Originally proposed in the Royal Commission on the Defence of the United Kingdom Report, published in 1860, it and the other land defences were omitted as part of general cost cutting with only the coastal defences on the Medway begin retained and completed under the original 1860 proposals. It wasn't until in the mid-1870s that a revised program was accepted, which included the construction of a convict prison at Borstal, to provide low cost labour for the construction of a line of four forts, Forts Bostal, Brigdwoods, Horsted and Luton (a further three forts were constructed with the use of convict labour). Its construction started in 1879 and was complete by 1889 after much delay.
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