In Burl’s ‘Prehistoric Henges’ he states that the huge earthworks of Marden and Durrington Walls, etc are so big, and contain so much evidence of permanent occupation, that they have to be interpreted as settlement sites, rather than ‘henges’.
Clearly ‘ritual’ things were going on at Marden – after all, it contained the Hatfield Barrow, and even has a little henge within its boundary. But its area is huge at 14ha, much bigger than any ‘normal’ henge. Burl (incongruously) says you could park 16,000 cars in it if you wanted. He thinks it was more a territorial centre, with the earthworks having a defensive role, rather than being the henge itself.