21/07/1998 One of the original 17 Northampton roadblocks constructed of steel rails. The roadblock was reinforced with concrete cylinders in mid 1941. It was retained in September 1941, when 14 of the road blocks were removed, and strengthened and re-designated a Defended Locality.
Concrete cylinders from removed roadblocks were reused at three defence localities, and others were made. In all there were 750 cylinders provided for the defence of Northampton. Road block and defended locality were manned by 12th Btn Northamptonshire Home Guard (Northampton Borough) from 16 August 1940 until 1944.
For further information see SRF.