Brean Down Fort forms part of a
line of defences, known as
Palmerston Forts, built across the channel to protect the approaches to
Bristol and
Cardiff. It was fortified following a visit by
Queen Victoria and
Prince Albert to
France, where they had been concerned at the strength of the French Navy. The
Royal Commission on the Defence of the United Kingdom, under direction of
Lord Palmerston, recommended fortification of the coast. Brean Down Fort formed part of a strategic coastal defence system covering the channel between the mainland and the islands of
Steep Holm and
Flat Holm. Four acres of land at the end of Brean Down were requisitioned in 1862, with construction beginning in 1864 and completed in 1871. The fort was originally armed with seven
rifled muzzle-loading guns, which were among the last of this type to be made at the
Woolwich Gun Foundry. These sited at three main gun positions, including W battery containing two guns on 'C' pivots (rotating around a reused Georgian cannon set upright in the ground). Each gun weighed 7 tons and had a charge of gunpowder able to fire a Palliser shot at per second. This could pierce of armour at . It was proposed to replace the guns with larger versions in 1888 but this was never put into action. It had a large, underground, main gunpowder magazine, and high. The fort was staffed by 50 officers and men of the Coast Brigade,
Royal Artillery, but no shots were ever fired in action. In 1897, following wireless transmissions from
Lavernock Point in Wales and Flat Holm,
Guglielmo Marconi moved his equipment to Brean Down and set a new distance record of for wireless transmission over open sea. The end of the fort's active service came at 5 a.m. on 6 July 1900 when the No. 3 magazine which held 3 tons (3 tonnes) of gunpowder exploded. An inquiry found that Gunner Haines had fired a
ball cartridge down a ventilator shaft causing the explosion, after being put on a charge for returning late to barracks, however this explanation has been challenged. The wall separating the fort from the moat on the south west corner was demolished and wreckage thrown up to . No one knew why the gunner had blown up the fort, but it has been speculated that it was an act of suicide. The cannons were hauled away by
traction engines. It was then used as a café, owned by the Hillman family from at least 1907 until sold in 1936 to the 'bird sanctuary people'. ==World War II==