Variation of condition 1 of planning permission dated 8th June 2022 (RN: 21/07082/FULL) for the alterations to 6 Charles Street to include the erection of a single storey mansard roof extension and changes to the fenestration on Hays Mews elevation, partial demolition and rebuilding of 1 Hays Mews and amalgamation with 6 Charles Street; all to enlarge existing flats (Class C3). Creation of a courtyard at rear ground floor level of 1 Hays Mews and a terrace to the rear of 6 Charles Street at fifth floor level, installation of green roof areas to the main roof of 1 Hays Mews and the rear of 6 Charles Street at part fifth floor level. [SITE INCLUDES 1 HAY'S MEWS]. NAMELY, to allow external alterations to both Charles Street and Hays Mews elevations including replacement of entrance door and surround at 6 Charles Street, amendments to the window fenestration to mews internal lightwell, new rooflight and AOV vent; and internal alterations to apartment layouts. (Application under Section 73)

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 listed building consent dated 21.12.18 (RN 18/08464/LBC) for the Variation of Conditions 1 and 10 of listed building consent dated 29 May 2018 (RN: 18/01318) for, 'Use as six self-contained flats (Class C3) including 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 Removal of condition 3F (requiring the submission of details of the pipe and cable routes for the second floor sprinkler system).

Variation of Condition 1 of planning permission dated 29 April 2019 (RN: 17/09802) for 'Demolition of mews building and lower ground and ground floor rear extensions. Erection of replacement mews building on lower, ground and first floors to provide a four bedroom dwellinghouse (Class C3), accessed from Wigmore Place. Erection of replacement lower ground and ground floor levels rear extension to the main building and use of lower ground, ground floor and first to fourth floors as 11 x flats (Class C3). Alterations to rear elevation including the installation of new windows (Land Use Swap with 60 Wimpole Street 17/09804/FULL); NAMELY new timber windows and alterations to plant.