Also Mike Pitts has written an article in the magazine 'British Archaeology' which should be out later this week, I should get the online version tomorrow.

https://mikepitts.wordpress.com/2015/12/07/have-archaeologists-found-stonehenge-quarries/

Whatever the outcome, Presceli is a marvellous place that has a true prehistoric feel about it, I can fully understand the excitement of the archaeologists and also the 'sense' that such rocky outcrops are 'sacred'....