This part of Wiltshire is among the most magically powerful places on earth.
The thing that makes me suspicious about this one, is that it lines up very nicely with the tractor tracks. If this were created by some unseen intelligence from a different plane, why would they feel the need to do this?
In fact, if they are intent on letting us know they are here, so to speak, why not blow the speculation out of the water and create one in a field without tracks - there must be a few kicking around, surely??...or maybe they would just like to keep us guessing?! Hmm.