Steynewood Battery is one of only six High Angle Fire Batteries built in the UK and is probably the best preserved on the surviving four. Built between 1889 and 1894 Steynewood Battery at a cost of £1,4501. Six 9-inch RML High Angle Fire guns were installed in the battery. The gun pits were dispersed in pairs, separated by underground magazine which acted as traverses. The general design of the battery was in accordance with the Twydall Profile.
The site is now owned by the Thornycroft family who build a house at the location as a boat testing tank in 1910. Thornycroft are now part of BAE systems.
TNA reference WO78 2623/5032