Geograph - photograph every grid square

This is, subject to confirmation, part of a FW3/23 emplacement installed as a component of the defences of the WWII RAF Wroughton airfield. See SU1578 : Anti-aircraft emplacement (part 1), Beranburh field, Wroughton, Swindon for the other part. From the Archaeology Data Services website:

"An irregularly-shaped anti-aircraft emplacement, with a covered and an open section. It is of double brick construction with cement cladding externally and on the inside of the weapon bay. The roof is a single slab of concrete (now partially displaced) and the whole emplacement is buried to roof level. Access is by a flight of steps into the covered bay and then by a passage through into the weapon pit. In addition to the passage, the covered section consists of an additional 'room'. Just over a metre square, this contains remains of cabling (2 strand copper core, lead insulated) affixed to the wall with lead brackets. The open gun pit is largely full of rubble, but underneath this are the remains of a centrally placed gun mounting bracket bolted onto a brick/concrete plinth. The bracket (28 cm high with a 9 cm diameter bore) still has two adjusting securing bolts in place. On the top of the wall around the open section there are the remains of what appear to be 3 crenellations, possibly to permit a local defence. The emplacement has a commanding view SW to NW."