Returning from Flower's Barrow to Povington Hill in deep sea mist I happened to unintentionally stray fractionally from the 'official path' and notice several 'mounds' - for want of a better word - littered with shell debris etc. One (see image) appeared to have definite internal structure.

http://www.themodernantiquarian.com/img_fullsize/128934.jpg

There's nothing on Pastscape (as far as I'm aware) and to my layman's eye they look too regular to be disturbance caused by shell impacts? Then again, maybe not. Needless to say it would not be surprising to find BA round barrows in such a location with so many others in the area.

Obviously didn't touch anything and would advise anyone who may intend to go have a look to take great care...