Fort Cumberland (England)

Fort Cumberland is a pentagonal artillery fortification erected to guard the entrance to Langstone Harbour, east of the naval port of Portsmouth on the south coast of England. It was sited to protect the Royal Navy Dockyard, by preventing enemy forces from landing in Langstone Harbour and attacking from the landward side. Fort Cumberland is widely recognised as the finest example of a bastion trace fort in England.

The first fort (1747-1785)

The first fort on the site was built by the Duke of Cumberland. Work commenced on January 1, 1747, and was substantially complete by the end of 1748. The fort had an irregular star shaped form, and was of earthwork construction. In section, the defences comprised a glacis, banquette and covered way, a dry ditch, berm, rampart, parapet and terre-plein. Within the body of the fort, a number of brick buildings were constructed, comprising a guardhouse, storeroom and powder magazine; of the two proposed barrack blocks, only one is believed to have been completed.

The second fort (1785-1812)

Fort Cumberland was completely rebuilt in masonry, and on a considerably larger scale, as part of a programme to improve the fortifications of Portsmouth. Major building work started in 1785, although preliminary stockpiling of materials began in 1782, and was essentially completed by 1812. In the course of construction all traces of the original fort were destroyed, with the exception of the guard house and store room, both of which were incorporated into the new design. The second fort occupies a similar position to the first, but is substantially larger in scale, enclosing an area of 24 acres, and on a different alignment. It is a polygonal fort, with five bastions and a ravelin on the western side. It was the last fort with angle bastions to be built in the United Kingdom, and the first to provide casemated ordnance.

Re-armament: the 1850s - 1860s

By the late 1850s, the development of rifled cannon had rendered the fort's smooth bored muzzle loading ordnance obsolete. In late 1858 the fort was transferred from the War Department to the Board of Admiralty and, in 1859 it became the headquarters of the Royal Marine Artillery. Between 1860 and 1861, the defences were improved to accommodate new muzzle loaded Armstrong guns.

Re-armament: the 1880s - 1890s

Between 1886 and 1892, major modifications were made to three of the bastions to accommodate new armaments, including Moncrieff disappearing guns. These modifications included cutting down the bastions and infilling them internally, and the creation of new magazines underneath. By 1892, the fort was equipped with three 6 inch RBLs, two 9 inch RMLs and 1 64 pounder.

The fort in the 20th century

Fort Cumberland remained in military ownership for most of the twentieth century, serving as a base for the Royal Marine Artillery howitzer and anti aircraft brigade, and later for the Royal Marine Mobile Naval Base Defence Organisation, as an experimental and training centre. The fort saw brief action during the Second World War when, on August 26, 1940, it was hit by a German air raid in which eight Royal Marines were killed.

In 1964 the fort was scheduled as an ancient monument, and subsequently taken into the guardianship of English Heritage in 1975. Since that time, the fort has served as a base for English Heritage's archaeological team, the Central Archaeology Service (formerly the Central Excavation Unit). In 1998, the Ancient Monuments Laboratory were relocated to the fort, leading to the creation of a new Centre for Archaeology. Currently access is limited to pre-booked guided tours.[1]

References

Douet, James (1998). British Barracks 1600-1914: Their Architecture and Role in Society. English Heritage. ISBN . 

Magrath, Philip A. (1992). "Fort Cumberland, 1747-1850: Key to an Island's Defence". Portsmouth Papers (Portsmouth City Council) 60. ISBN 0-901559-86-5. 

Saunders, Andrew (1989). Fortress Britain: Artillery Fortifications in the British Isles and Ireland. Beaufort Publishing Ltd. ISBN . 

Saunders, Andrew (1997). Channel Defences. B. T. Batsford Ltd. ISBN . 

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157 Ferry Road, Southsea, Portsmouth, Southsea, Portsmouth PO4 9UD, UK Get directions

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