From the description in the Herald article posted in the news
http://www.theherald.co.uk/news/archive/28-8-19103-0-5-38.html
it sounds like it's this site otherwise known as 'Callanish X', see
http://www.megalithic.co.uk/article.php?sid=274071080
text from "The Stones around Callanish" written by Gerald Ponting and Margaret Ponting (now Margaret Curtis) in the late 1980s. Or else it's another circle very close to it.
Cheers
Andy