Summarised from report:

During the early part of the Second World War, the battery was provided with additional close defence: this included two Blacker Bombard (spigot mortar) emplacements Near pillbox 1, close to the remains of Battery Command Post 1, and flanking the covered way. These were sited to cover the western end of the battery and, in particular, the concrete road which had been constructed along the ridge to a new heavy AA battery. All that remains of the southern one is the concrete pedestal and the stainless steel pintle: the surrounding pit and lockers have been filled in, though metal uprights testify to the existence of a corrugated iron revetment. The pit around the pedestal of the northern emplacement survives, albeit in poor condition. (1)

<1> RCHME, 2000, The Western Heights, Dover, Kent. Report No 8: The Citadel Battery: An early 20th-century coastal battery (Unpublished document). SKE17504.