A very overgrown World War 2 pillbox next to (south side) the Grand Union Canal Slough Arm, next to the bridge where it crosses the Fray's River. Also just north east of the north end of Trout Road.
The entrance door of the pillbox is blocked up.
EDOBID: e11507
407 photos taken in October 2021 with a Sony a7R III and processed in Reality Capture.