If I am correct, this is the same field where an off duty police officer witnessed some strange entities 4 years ago. There is clearly some subtle energy inherent in this landscape through which an inter-dimensional intelligence can manifest itself in our reality. If this is a man-made formation, then hats off to whoever did it. There is only approximately 5 hours of darkness at the moment, and the field is situated right by the A4. On first impressions, it looks similar to the pictogram formations which first began to appear in the early 1990s.
The farmer has very kindly allowed access to the field for a small fee so I will certainly be going down to investigate at the weekend. I will post all the pictures and a small report as soon as I return.