200 yards NW of Great Porters Farm buildings stands a concrete hexagonal pillbox. From this position, high on the hill-side, it has a commanding view north to the River Colne some 300 yards distant. It measures 22ft across and has an anti-aircraft well complete with concrete plinth and steel fittings on which to mount the machine gun. The low 'porch-type' entrance - covered with earth - is on the south side. There are six small loopholes.

One photo of site.<1>

SITE ASSESSMENT: Contemporary records show that Great Porters Farm had six pillboxes during WWII. Unusually for such a quantity, all of them have survived.<2>

See also <3>.