Amendments to planning permission dated 29 May 2018 (RN: 18/01317/FULL) for the: Use as six self-contained flats (Class C3); demolition of existing rear extensions and erection of new extension over lower-ground and ground-floor, excavation of rear garden and vault at lower ground floor level; installation of internal lift to serve second to fourth floors, internal alterations, replacement windows, alterations to facade, provision of rooftop plant and a condenser unit within an acoustic enclosure within the rear patio at lower ground floor level and condenser in front lightwell and landscaping. NAMELY, to allow moving of steps slightly out into B4 Hallway and double door (ND B4.1) centred to glazed wall at lower ground floor; glazed doors (ND G8.5) revised to one set of double doors instead of three double doors at ground Floor; metal coping of rear extension at first floor replaced with Portland stone coping, to match existing surrounding Portland stone copings; and fourth floor door (ND F3.1) to F3 Bedroom relocated along the wall.

Amendments to planning permission dated 20 June 2016 (RN: 15/10444) for: Variation of Condition 1 of planning permission dated 8 December 2011 (RN10/01741/FULL) for development of 55-91 Knightsbridge (including retention of Knightsbridge and William Place facades) to provide retail (Class A1) at basement and ground floor levels, office ( Class B1) at part ground, first, and second floor levels and residential flats at part ground, part first,part 2nd and 3rd to 5th floor levels. Off street servicing and new sub basement car park. Removal and replacement of existing tree on William Street. Demolition of 1-2 William Street and its replacement with a redesigned building with internal linkages to 55-91 Knightsbridge. Restoration and repair of external facades and roofs to 3-7 William Street including reinstatement of original roof profile at 4 William Street, conversion of 1st to 3rd floor levels of 3 and 4 William Street for residential purposes ( Class C3). Namely, the substitution of new drawings to allow minor material amendments comprising a revised number and mix of residential units; the provision of a terrace for a residential unit on the western end of the building; erection of a lift shaft to the rear of 4 William Street; alterations to shopfront of Nos. 3 - 4 William Street; extension at 4th floor level to the rear of Knightsbridge; and reconfiguration of the fenestration. Namely, amendment to the external air vent at 4 William Street.