Hi-tech vet to clean stone circle

from BBCi
Druids tried to spiritually clean them but now it is a vet’s turn to see if he can physically restore them to health.
The ancient Rollright Stones on the Oxfordshire/Warwickshire border have been off-colour ever since vandals daubed them in bright yellow paint.

Hi-tech ultrasound equipment used by vets to clean plaque from animals’ teeth is now to be used in an attempt to restore the stones. It is hoped the device will leave rare lichen on the stones untouched. Continues...