The fort was reconstructed between 1859 and 1869 as one of the
Palmerston forts in the line of
Portsmouth Harbour defences. It was designed to be fitted with 17 guns and had a barrack block at the rear to accommodate 100 men. It was not normally manned, with only a Master Gunner normally in residence at the Fort - in 1885 the Master Gunner was H Orchard. It was also used by units of the Volunteer Artillery - the
City of London Artillery Volunteers undertook gun practice from there in 1889. It was re-armed in the 1890s with three 6-inch
rifled breech-loader Mk. IV guns on hydropneumatic carriages. These guns were taken away in 1906, but the fort was rearmed in 1914. It was then a beach defence battery and was armed with a 6-pounder Hotchkiss anti-aircraft gun. At the end of the
World War I, it was demolished, leaving only an outline. ==Post-military use==