One of the features of this square is the elevated New Road, which crosses some of the highest land around.
This made it a perfect location for one of the Cold War ROC observation posts. The Royal Observer Corps was a long-standing part of the Civil Defence, the volunteers of whom formed the "home front" during the second world war. But with the advent of the nuclear arms race these volunteers undertook new responsibilities, including monitoring for the location of nuclear imacts and the monitoring of fallout.
There is a very well preserved ROC observation here, which was first manned on the 1st of February 1964, and closed on 1st of September 1991. Now in the possesion of the original landowner, it is kept locked and is not open to the public. See
http://www.derelictplaces.co.uk/main/printthread.php?t=25420 for interior photographs of the ROC point.