On the west side of the River Colne, a few yards north of Lexden Bridge, the embankment is lined with a concrete wall, c. 5’ high up to the level of the meadow behind. Projecting from the top of the wall are 9+ anti-tank rails, each 3-4’ high and probably made from cut lengths of rolled steel joist (RSJ). The river at this point is very shallow and these would have been put into this position to prevent tanks crossing the river bed. A low-level aerial photograph taken in 1948 shows the wall, plus three anti-tank cubes between it and the W end of the bridge. The site of the rails has not been visited but they can be clearly seen from the bridge.