The rabbits have been cleared off the hill for generations. They are doing a huge amount of damage now.
A lot of the burrows have loose earth that is constantly being thrown down the hill.
One local tells me the problems can be sorted out in an afternoon with a couple of ferrets.
The larger bushes will have to be cut down by hand.
Once Silbury was classed as a SSSI and made part of the WHS the Greenaways were no longer allowed to clear the hill.
PeteG