A World War 2 Type 22 pillbox just north of the tett turrets in Hornchurch Country Park, London. The park used to be the RAF Hornchurch airfield, hence the defences in this area.
EDOBID: e03956
https://en.wikipedia.org/wiki/Hornchurch_Country_Park https://en.wikipedia.org/wiki/RAF_Hornchurch
953 photos taken in November 2021 with a Sony a7R III and processed in Reality Capture.