Even the name is mystery, “Man Road Ditch”. The ditch is of unknown date and unknown purpose and runs from the foot of Knowl Hill in a NNW direction.
The earliest reference found so far, is in the first series 6″ OS map (1851) of the area.
See the aerial view of the ditch here. Note select “satellite” to see an aerial photograph of the ditch.
Here is a Lidar view
Man Road Ditch
The feature that crosses it at the bottom of the image is the turbine access road!