Demolition of buildings including Sarah Witham Thompson, Gressingham and Melling Halls, Black Box Theatre, Old Dining Room and the Long Corridor and erection of a 4 storey Extra Care residential building (use class C3), partial demolition, conversion and change of use of the Art Studio from education facility (use class D1) to ancillary space associated with the Extra Care residential building and change of use and conversion of Barbon Hall and Hornby Hall from education facility (use class D1) to provide affordable residential apartments (use class C3) with associated landscaping, parking, access and service infrastructure (pursuant to the variation of conditions 2 and 26 on planning permission 20/00554/FUL to enlarge the building footprint, amend the site layout, fenestration and car parking (including reduction by one space) and addition of lift overruns and a safety railing to the roof on the extra care building and to update the Energy Statement)

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.