Variation of Condition 1 of listed building consent dated 05 June 2020 (RN: 19/08752/LBC) for, 'Erection of rear extensions at second, third and fourth floor levels to incorporate a new lift; demolition and replacement of rear courtyard floor slab, replacement of the existing mansard roof and raising of chimney stacks; demolition and rebuild of two chimney stacks on the mews; replacement of windows; installation of air conditioning units at roof level and under pavement basement vaults; Internal alterations including; installations of Fan Coil Units and services throughout, replacement of chimneypieces; replacement floor finishes, insertion of partitions and redecoration throughout'; NAMELY, to allow the reduction in width of the consented new southern rear windows on the second, third and fourth floors; amendment to consented rear walk on roof light panes in courtyard to align glazing bars with door openings above; installation of a new concrete slab below the paving in the front lightwell; addition of wall lights either side of front light well basement entrance door; addition of security cameras on the front and rear ground floor elevations; installation of an intercom to the right of the main entrance door; new handrail and balusters to staircase between second and fourth floor; landscaping works to the rear courtyard comprising rendering; stone paving; installation of light fixtures and installation of trellis panels and various internal alterations to all floors.

Amendments to planning permission dated 14th June 2018 (RN: 17/08589/FULL) for: 'Demolition of 31-35 Brick Street and 37-49 Brick Street and the erection of a stepped ground plus four - seven storey building; including an additional basement level, to be used for up to 135 hotel bedrooms and function and meeting rooms in connection with the existing hotel (Class C1) at 108-115 Piccadilly (Park Lane Hotel). The replacement of the existing first floor link bridge; the creation of a basement servicing tunnel between the Park Lane Hotel and 31-49 Brick Street; the creation of associated car and cycle parking and servicing facilities; the replacement of the existing rear canopy of the Park Lane Hotel on Brick Street; the removal of part of the rear ground and first floor stair block to create a new rear entrance; the recladding of the rear ground floor including new windows and door and other associated works'; NAMELY, to amend the wording of Condition 3 (Code of Construction Practice) to split Part C into two parts: Part 1 - Construction of part of the approved service beneath Brick Street; and Part 2 - Construction of the wider construction works.

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.

Variation of Condition 1 of planning permission dated 01 March 2018 (RN: 17/09342/FULL) as amended by a non material amendment dated 18 May 2020 (RN/20/03063) for, 'Demolition including the existing fourth floor, roof above and partial demolition of rear wall. External alterations including the erection of a replacement fourth floor with an additional single storey mansard storey at fifth floor level above; erection of an extension to the rear to new fifth floor level to provide an additional seven bedrooms for use in connection with the existing hotel (Class C1); extension to existing lift shaft with overrun and creation of new lift shaft with an overrun at new roof level; creation of a new green roof; relocation of existing roof plant within enclosures in two locations at fourth and fifth floor levels. reinstatement of Juliet balconies at first floor level and the erection of a new portico at ground floor level along the Clarges Street frontage. Internal alterations at all levels throughout and associated works (Site includes 39-42 Clarges Street)'; NAMELY, to allow the reconstruction of the rear wall of no. 7 Half Moon Street and the reconstruction and extension of the rear wall of no. 8 Half Moon Street; removal of a closet wing wall at the rear of no. 10 Half Moon Street closest wing wall to facilitate a larger, more accessible lift lobby and associated removal of an adjacent window; rebuilding and straightening of a corridor on the first and second floor of nos. 7 and 8 Half Moon Street; and associated works.