Approximately 20 yards from a bend in the River Colne is an hexagonal, concrete pillbox. It is 19ft 6in wide, has small loopholes and the low 'porch-type' entrance is on the south side. Around the pillbox, three per side, are the 1in remains of 1/2 inch steel rods. These are spaced out 20in from the top and may have originally been to secure a disguise or camouflage netting. The pillbox walls are 3ft 6in thick.

One photo 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>.