The Telegraph's report on it...
What evidence is there at the present time to suggest it is for ritual purposes?
http://www.theguardian.com/uk-news/2015/sep/07/stonehenge-archaeology-ritual-arena-neolithic-monument?CMP=share_btn_tw
Well its prehistoric for a start. And it doesnt have an obvious use. Erm, did I mention its near stonehenge?