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To prevent the gun's shadow giving itself away, it would often be moved to lie parallel with the front of the gun house. Often a false roof would be built on top of the gun house and a canvas screen, painted to represent the front of a building, could be drawn across the front and secured with pegs, as shown in the inset image (K). In the battery Command Post (E), ATS personnel would operate the heightfinder (F), spotting binoculars (G), and the predictor (H). HAA gun, one of the earlier guns on the site, covered by a camouflage screen. The weight of this structure was supported by timber and brick props and pillars in the basement and sub-basement. A 3ft-thick concrete and steel 'slab' (1) was installed over the basement of the building, together with a sub-layer of interlocking steel beams (2). To the left of the main gun is a concrete holdfast (D) for a 3.7in.

The men of the battery were billeted in the hotel next to the No.2 Gun. An inset (J) shows the interior of the observation post for the battery, complete with a depression position finder, spotting binoculars and transmitting dial This battery, located on Primrose Hill in North London, was one of only three twin-5.25in. These guns were diverted from Navy contracts and were obtained in an exchange for Bofors LAA guns. The beach is also protected by a pillbox (I), and also by several Spigot Mortar positions close to the guns. A 3.7cm anti-armour gun (5) and two heavy machine-gun squads (6) have been attached to the platoon along with an anti-armour rifle troop (7).

The platoon's 5cm light mortar (4) is positioned to the rear, but in a place where it could observe its target area, as it had no observers.

Considerable thought was given to the camouflage of coast artillery positions.