@muminitaly There's certainly a connection between the sites - the earliest Orcadian Grooved Ware style pottery near Stonehenge is associated with the Bulford/Double Hedges neolithic pits dating to around 3000BCE. This is the same location as the "double henge" dating to around 2,900BCE, so very early for this style of monument in the south of Britain. See https://intarch.ac.uk/journal/issue56/2/full-text.html