So that means they were flattened the long barrows? shame there was no 'before' photos of them, no large stones then, just earthen barrows.......
It also shows of course that settlement was long lived on Dorstone Hill (or not) but it would be interesting if the Neolithic settlement could be 'unearthed'

edit; you have got to give F/B its due, apart from Digital Digging, Aerial-Cam went down and photographed as well, so just look at some of these flints...

http://digitaldigging.net/blog/the-houses-on-dorstone-hill-images/