1)
The proposals, by virtue of their scale, size and prominence on the building would fail to preserve the character and appearance of the property, the terrace and the wider Sloane Stanley Conservation Area. The proposals would cause less than substantial harm to the conservation area without providing public benefit to outweigh the harm and so would be contrary to policies CL1, CL2, CL3, CL6 and CL11 of the Local Plan 2019 and the NPPF.