Might this comment from the recent "Stonehenge Synthesis " signal the demise of you know what ?
"Considerable interest has arisen from the discovery of parallel ditch and ridge features
(Fig 2.3) recorded in Atkinson's 1956 excavation of the Avenue (Cleal et al 1995, 309),
and relocated by the Stonehenge Riverside excavations in 2008 (Parker Pearson et al
2008a). The question of whether these are periglacial features that were visible as parch marks to the Stonehenge builders (Parker Pearson et al 2008a), or ruts associated with
the previous use of the avenue as a by-way (Chadburn pers comm) remains open but
recent results showing their extension northeastwards along a line towards Durrington
supports the latter interpretation (Darvill and Leuth, in prep)."