A World War 2 Type 22 pillbox toward the southern end (south of the tett turrets) of Hornchurch Country Park, London. The park used to be the RAF Hornchurch airfield, hence the defences in this area.
EDOBID: e03955
https://en.wikipedia.org/wiki/Hornchurch_Country_Park https://en.wikipedia.org/wiki/RAF_Hornchurch
768 photos taken in November 2021 with a Sony a7R III and processed in Reality Capture.
The rear could not be photographed due to the thick reed beds.