RAF Wittering: nuclear fissile core stores, buildings A09, A10, A11, A14, A15, A27, Vw28, A29 and A33

MATERIALS: Each building is of stretcher-bond buff brick under a shaped flat concrete roof.

PLAN: They are single-cell buildings, six of which are arranged on a square plan for the reception of single cores and three are rectangular to accommodate two fissile cores.

EXTERIOR: Each store or 'hutch' is of one storey and is approached by a concrete path and consists of a square or rectangular block with a single timber four-panelled door clad on the exterior with sheet steel under a plain concrete lintel. Some of the doors retain their original locking mechanisms. There are no other openings. The flat roofs are of shuttered concrete with an irregular wavy profile which casts a shadow similar to that of small trees, designed to confuse aerial observation.

INTERIOR: Each 'hutch' has an electric tubular heater opposite the doorway (some of these have been replaced with hot-water radiators) and there are small double-pole electrical junction boxes and Bakelite switches for the single overhead light. The floors are of concrete and set within them are the fissile core receptacles in the form of single cylindrical stainless-steel flasks contained in a raised concrete collar. The lids are counterweighted, rotate when open and are locked by a simple turn-catch and spigot. Three of the stores have the flasks off-set from the centre to allow space for a second flask, but all second flasks have been removed and the floor re-concreted.