Pillboxes were strong-points, generally of reinforced concrete, placed at strategic locations, such as at river crossings, or along coastal and inland anti-invasion ‘stop lines’ which were intended to slow down the progress of an attacking force. Some were designed for machine guns; others, more unusually, housed artillery. Thousands were built in the early stages of the Second World War: 28,000 are thought to have been erected, and a recent survey calculated that some 6,500 survive. They frequently formed parts of defence lines, which were belts of defensive structures intended to delay the invader.
This pillbox is a Type 22c that stands to the west of Clipbush Lane. It is clear that the pillbox was not the only defence to be placed here as a 1946 RAF aerial photograph shows a searchlight battery as well as possible machine-gun and anti- aircraft emplacements extending to the west of the pillbox.
I believe this is part of the defences for RAF Watton which was close by, which i suspect would have included other pillboxes two of which i am aware of (See F for Freddie).
If you look into the fields behind the pillbox you may be able to see some marks in the crops where these defences used to be.
You are looking for a small bison tube, please make sure it is placed back exactly where you find it.
Take care parking as this road is still used, mostly by farm traffic. if you enter the pillbox you do so at your own risk.