Amendments to planning permission dated 31 August 2022 (RN: 22/02609/FULL) (which varied planning permission dated 07 December 2020 (RN: 20/03048/FULL (as amended by 22/01515/NMA)) for 'Demolition of 55-58 Pall Mall and 1-4 Crown Passage, and erection of a new building with a part retained facade comprising basement, ground and six upper floors plus mezzanine with a new raised height mansard roof level, to provide office (Class B1) use at basement, part ground to seventh floor level, and provision of two flexible retail/ restaurant (Class A1/ A3) units at part ground level. Creation of terraces at 5th, 6th floor level and 6th floor mezzanine level, installation of plant, and provision of cycle parking spaces and facilities'. Namely, to allow amendments including, Internal revisions to layout and detail of door openings throughout ground to fourth floors; Lobby area added to secondary stairwell at first to fourth floor levels; Revised arrangement of openable doors at fifth and sixth floor level, onto terrace area; Tenant plant enclosure line adjusted to allow for interfacing with lift overrun; Door opening onto Crown Passage recessed to allow doors to open outwards within site boundary; Wall linings altered to reflect amendments to party wall information; Basement layout altered and associated revision of cycle parking layout, reducing the number of cycle parking spaces from 100 to 99; Maintenance access door added within basement; Revisions to fenestration detailing on southeast elevation; Revised materials to southwest and northeast elevations; Relocation of smoke extract system on roof; and Inclusion of door within plant screen for cleaning and maintenance purposes.

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.