Four years ago we carried out restoration to the south front steps of the Palace as they were moving away from the Palace. A similar issue presented itself on the other side of the Palace with the steps in front of the main entrance.
The North Steps showed significant signs of movement and deterioration; with cracks appearing indicating that they were gradually moving away from the main portico. This project was proposed to both stabilise and repair the steps.
Whilst working in this area we also looked to address other issues including the damage to the stone on north facing fronts of the pediments in the courtyard and the water ingress problems in the Undercroft of the Palace.
We carried out extensive investigations into this area and believe the problem in part was caused by a layer of clay used in the original construction having shrunk or otherwise moved.