From a high position on a hillside a 22ft wide, hexagonal concrete pillbox looks north towards the River Colne 240 yards away. In the centre is an anti-aircraft well equiped with concrete mounting plinth and steel fittings on which to mount the machine gun. Around the sides of the pillbox the remains of 1/2 inch iron rods project - 4/5 per side. The purpose of these is unknown, perhaps to hold disguise or camouflage netting. The low entrance, blocked with earth, is on the south side.

Two photos of site.<1>

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

See also <3>.