This Slump is a bit of a trick of the eye as there are long grasses and nettles that grow on the edge during the summer.
I have been taking photos from the same spot as photobabe for 3 years now and you can clearly see the vegetation rising. Having said that from another angle (at Trusloe bus stop) the side slumps do appear to be moving down.
You should have popped up to the Knoll down dig while you were here.
Geophysics has recently uncovered another 2 stones of the Beckhampton avenue and a series of burning pits but more about that later...