The use of a damp abrasive cleaning system on the calcareous sandstone of the Listed Building would result in the loss of fabric and patina of the stone including the combed tool marks which contribute to the character of this Grade II Listed Building. The sooty patina contributes significantly towards the building's local distinctiveness and accordingly that of the wider village; a non-designated heritage asset which has been recommended for designation as a Conservation Area. The loss of the hard outer skin of the stone and its historic patina would consequently be harmful to the special interest of the designated heritage assets (Listed Building and Proposed Conservation Area) and could lead to accelerated rates of decay of the relatively soft inner stone once the hardened external layer has been removed. As such the proposal would be contrary to policy in Chapter 12 of the NPPF and Development Policy 5 of the NYM Core Strategy and Development Plan documents which seek to ensure changes to a Listed Building will not have an unacceptable impact on its special historic or architectural interest.