Part demolition of the site for the refurbishment and extension to the existing facade facing onto Exchange square and upper levels; External alterations and improvements to facades facing onto Bishopsgate and at ground floor including new main entrance and new retail frontages; public realm improvements fronting Bishopsgate including new steps, seating and accessibility improvements; Increased height and widening of Exchange Arcade; creation of a new outdoor retail pavilion terrace for public use to level 1; creation of west extension terraces; creation of wing extension terraces; provision of external terraces for occupants at levels 4, 8, 9, 10, 11, 12 and roof terrace on level 13; provision of cycle storage and other works incidental to the development (9,920 sq.m).

Amendments to planning permission dated 23 June 2020 (RN: 19/09663/FULL) for Demolition and development, including basement excavation, behind a retained front facade of 41-45 and 57, 59 and 63 Pimlico Road, including: realignment of the rear elevation; installation of new roof structures, and the creation of external terraces; demolition of 61 Pimlico Road (fronting onto Pimlico Road) and reconfiguration of the Yard, retaining the existing piers and roof structure with new mezzanine level; replacement of shopfronts to 41, 43, 45, 57, 59, 61 and 63 Pimlico Road; replacement of the glazed roof lantern to Newson's Yard; creation of roof level plant enclosure above part of the builders' yard; creation of 5 x Class A1 retail units at basement, ground and mezzanine level; 2 x flexible A1/A3/B1/D2 units at ground and mezzanine level; with 9 x Class C3 residential dwellings at the first, second and third floor levels (with ground floor access), including mansard extensions to 41-43 Pimlico Road and 63 Pimlico Road; together with associated external alterations. Namely, to remove sidelights to rear elevation of 63 Pimlico Road; consolidation of louvres to plant room roof; and amendments to residential metal balustrade / planter design.

Amendments to planning permission dated 16th March 2021 (RN 20/04933/FULL) for 'Demolition of existing mansard roof and roof level plant and construction of two storey vertical roof addition with extensions at fourth, fifth, sixth and seventh floor levels for additional office (Class B1) floorspace. Use of the lower ground and basement level 1 for flexible/alternative office (Class B1)/retail (Class A1)/leisure uses (Class D2); basement level 2 for car parking, cycle parking, ancillary office uses and mechanical plant. Alterations to the existing building including new windows and entrance, new terraces to eighth and tenth floor levels and new plant enclosure at roof level and associated works'. NAMELY, to remove reference to level 1 and basement level 2; and for the description of development to read as follows: 'Demolition of existing mansard roof and roof level plant and construction of two storey vertical roof addition with extensions at fourth, fifth, sixth and seventh floor levels for additional office (Class B1) floorspace. Use of the lower ground and basement levels for flexible/alternative office (Class B1)/retail (Class A1)/leisure uses (Class D2); car parking, cycle parking, ancillary office uses and mechanical plant. Alterations to the existing building including new windows and entrance, new terraces to eighth and tenth floor levels and new plant enclosure at roof level and associated works'.

Amendments to planning permission dated 23 May 2019 (RN: 17/07726/FULL), namely to amend the description of development to read as follows: Extension of existing office and retail building and associated works to provide additional office floorspace at roof level, use of part of the ground floor for commercial and Sui Generis use, part demolition and alterations to the stone facade fronting Buckingham Palace Road and the part removal of the glazed building canopy, alterations to the public realm, creation of high level terraces, alterations to bus facility on Bulleid Way and roof top plant along with highway, landscaping and other 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.

Amendments to planning permission dated 26 May 2020 (RN: 19/01472) for: 'Excavation to create a deeper basement level and excavation under Wells Mews, demolition of 58-60 Berners Street and demolition behind retained facade of 14-17 Wells Street and erection of a new mixed use development within two adjoining buildings comprising lower ground, ground plus 5 storeys fronting Wells Street and lower ground, ground plus 7 storeys fronting Berners Street to accommodate flexible retail (Class A1) or financial and professional services (Class A2) or restaurant (Class A3) purposes on part lower ground and part ground floors, office (Class B1) on upper floors and installation of plant behind screening on both roof levels. The scheme also includes external alterations to 14 and 15 Eastcastle Street (part of Woolverstone House) to accommodate a wider and improved entrance into Wells Mews from Eastcastle Street, an upgraded residential entrance to 1 Wells Mews'; NAMELY, changes to the internal layout at lower ground and ground floor levels, removal of bridge and entrance doors to Berners Street retail unit, reduced depth beneath pavement on west side of Wells Mews to accommodate smoke vents, alterations to fenestration, retained roller shutter instead of new louvred access door to Wells Mews, extensions to railings around roof level plant, altered layout of roof level plat and associated alterations.

Demolition and development, including basement excavation, behind a retained front facade of 41-45 and 57, 59 and 63 Pimlico Road, including: realignment of the rear elevation; installation of new roof structures, and the creation of external terraces; demolition of 61 Pimlico Road (fronting onto Pimlico Road) and reconfiguration of the Yard, retaining the existing piers and roof structure with new mezzanine level; replacement of shopfronts to 41, 43, 45, 57, 59, 61 and 63 Pimlico Road; replacement of the glazed roof lantern to Newson's Yard; creation of roof level plant enclosure above part of the builders' yard; creation of 5 x Class A1 retail units at basement, ground and mezzanine level; 2 x flexible A1/A3/B1/D2 units at ground and mezzanine level; with 9 x Class C3 residential dwellings at the first, second and third floor levels (with ground floor access), including mansard extensions to 41-43 Pimlico Road and 63 Pimlico Road; together with associated external alterations.