The press releases has only just come out Sweetcheat, so they are probably waiting for the papers to pick it up but no mention of which long barrows, but there is a Henry Rothwell computer image of the long hall in Heritage Daily.

http://www.heritagedaily.com/2013/07/archaeologists-discover-6000-year-old-halls-of-the-dead-in-uk/97133.

Anyway pulled out the book The Significance of Monuments by Richard Bradley, he covers the subject quite well...