This is the field near Pensarn (near Crosswell) where the digging action might be concentrated this year in September, when MPP and all the other boys and girls roll up for the annual Pembrokeshire dig. At least, we think this might be the field, if several little birds have tweeted the right info towards us, and if Hugh is right. The grid reference is SN 123359.
Not sure whether all those things we can see are bales of straw, animals or boulders -- must get over there one of these days and take a look. Maybe Hugh can enlighten us? Apart from these prominent features on the photo, there do not seem to be any traces of patterns in cropmarks, parchmarks or subtle shadows showing raised surface features or hollows. All very intriguing.
Modification with extra images:
The blobs on the image clearly were animals!
Thanks to Simon K for alerting us to the much better definition on Bing Maps. Here are two images from the Bing web site.