South of the River Colne at this point the ground slopes upwards and on the hillside, almost completely hidden in trees and bushes at a field junction, is a 21ft 6in diameter, hexagonal, concrete pillbox. In the centre there is a hexagonal anti-aircraft machine-gun well with a central concrete pillar surmounted by its steel mounting fittings. The pillbox has small loopholes and the entrance is on the south side.

Three photos of site.<1>

See also <2>