A (1st City of London) Battery, Honourable Artillery Company is a L118 light gun battery that provides a reserve to 7th Parachute Regiment Royal Horse Artillery. Its predecessor was a horse artillery battery that was formed from Light Cavalry Squadron, HAC, in 1891. It transferred to the Territorial Force in 1908 as artillery support for the London Mounted Brigade. Post-war, the battery, along with B Battery, Honourable Artillery Company, was amalgamated with the City of London Yeomanry (Rough Riders) to form the 11th (Honourable Artillery Company and City of London Yeomanry) Brigade, RHA.