Variation of Condition 1 of planning permission dated 19th April 2023 (RN: 20/04541/FULL) for, 'Erection of an extension at the rear of 18-22 Wigmore Street at first to fourth floor levels and alterations to the rear roof form to allow conversion of the attic space to provide additional residential floorspace for the existing flats (Class C3), including the infilling of an internal lightwell adjacent to 16 Wigmore Street and the installation of a new lift. Alterations at basement and ground floor level including the infilling of a rear lightwell at basement and ground floor levels. Installation of plant within an associated enclosure at rear first floor level with a green roof over and screened plant on a flat roof at fourth floor level to the rear of 22 Wigmore Street. Alterations to the front of the building including new windows, shopfronts and metal railings at ground floor level. All in connection with the dual / alternative use of the basement, ground and first floors as either office (B1) / retail (A1) or a sui generis use comprising piano showroom, office space, new recital room, piano practice rooms and workshop space and use of the second to new fifth floors as 8 residential units comprising 3 x 1 bed; 4 x 2 bed and 1 x 3 bed' (SITE INCLUDES 18, 20 AND 22 WIGMORE STREET); NAMELY to install additional plant at rear first floor level and amend the approved enclosure, decorative cladding and green wall. (Application under Section 73 of the Act).

Variation of Condition 1 of planning permission dated 19 April 2021 (RN: 20/04541/FULL) for, 'Erection of an extension at the rear of 18-22 Wigmore Street at first to fourth floor levels and alterations to the rear roof form to allow conversion of the attic space to provide additional residential floorspace for the existing flats (Class C3), including the infilling of an internal lightwell adjacent to 16 Wigmore Street and the installation of a new lift. Alterations at basement and ground floor level including the infilling of a rear lightwell at basement and ground floor levels. Installation of plant within an associated enclosure at rear first floor level with a green roof over and screened plant on a flat roof at fourth floor level to the rear of 22 Wigmore Street. Alterations to the front of the building including new windows, shopfronts and metal railings at ground floor level. All in connection with the dual / alternative use of the basement, ground and first floors as either office (B1) / retail (A1) or a sui generis use comprising piano showroom, office space, new recital room, piano practice rooms and workshop space and use of the second to new fifth floors as 8 residential units comprising 3 x 1 bed; 4 x 2 bed and 1 x 3 bed' (SITE INCLUDES 18, 20 AND 22 WIGMORE STREET); NAMELY, to allow removal and replacement of existing central core and floors (retrospective), minor changes to internal configuration, provision of new entrance gates to permitted railing enclosure at the front, new door height gates to central entrance and new timber painted frames to glazed entrance. (Application under Section 73 of the Act).

Variation of condition 1 of planning permission dated 19 April 2021 (RN: 20/04541/FULL) for the: Erection of an extension at the rear of 18-22 Wigmore Street at first to fourth floor levels and alterations to the rear roof form to allow conversion of the attic space to provide additional residential floorspace for the existing flats (Class C3), including the infilling of an internal lightwell adjacent to 16 Wigmore Street and the installation of a new lift. Alterations at basement and ground floor level including the infilling of a rear lightwell at basement and ground floor levels. Installation of plant within an associated enclosure at rear first floor level with a green roof over and screened plant on a flat roof at fourth floor level to the rear of 22 Wigmore Street. Alterations to the front of the building including new windows, shopfronts and metal railings at ground floor level. All in connection with the dual / alternative use of the basement, ground and first floors as either office (B1) / retail (A1) or a sui generis use comprising piano showroom, office space, new recital room, piano practice rooms and workshop space and use of the second to new fifth floors as 8 residential units comprising 3 x 1 bed; 4 x 2 bed and 1 x 3 bed. (SITE INCLUDES 18, 20 AND 22 WIGMORE STREET). NAMELY, to allow removal of central core and floors and associated replacement to improve sustainability, acoustic and fire safety performance; modifications to ancillary uses within basement, including provision of ancillary kitchen and restaurant area serving guests of Bechstein Hall; kitchen extract and ductwork to be localised; introduction of entrance gates to main front entrance; minor amendments to plant at the rear; and provision of open pergola walkway on the roof at the rear.

Variation of Condition 3 of planning permission dated 17th April 2018 (RN 18/01359/FULL, to remove the one year restriction on capacity & extended opening hours of the Class A3 restaurant at No. 21-22 ), which itself was a variation of the planning permissions dated 31st January 2017 (RN 16/10936/FULL, temporary permission for increased capacity & extended opening hours of the Class A3 restaurant at No. 21-22 ) & the original planning permission dated 17th September 2014 (RN 14/06746) for 'Use of the first floor of 18-22 Weighhouse Street as residential accommodation (Class C3) comprising 1x1-bedroom & 1x2 bedroom flats; amalgamation of existing Class A1 retail units, to be located at basement & ground floor of Nos. 18, 19 & 20, as a single retail unit; relocation of existing Class A3 cafe/restaurant to be located to Nos. 21 & 22 (at ground and basement levels); alterations to the shopfronts & to the fenestration of the property at ground and first floor levels' - NAMELY, to allow for primary cooking within Unit 1 at 18-20 Weighhouse Street.

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 3 March 2020 (RN 19/09981/LBC) for the Variation of condition 1 of listed building consent dated 20 February 2016 (RN: 15/10446/LBC) for the: Development of 55-59 Knightsbridge (including retention of Knightsbridge facades, demolition and the dismantling and reinstatement of roofs and chimneys) to provide retail (Class A1) at basement and ground floor levels and 18 residential flats at first, part second floor and third to fifth floor levels. Demolition of 1-2 William Street and its replacement with a redesigned building with internal linkages to 55-91 Knightsbridge. Namely, to allow alterations to William Street Residential Entrances, door to Wilton Place, fenestration changes to rear facade, increased lift Shaft to rear face of William Street, merlons to west elevation, West façade end bay reconstructed, chimneys to coping stone detail in mansard, pavilion gable apex roof stones, ridge height of mansard roofs, projecting signs to shopfronts, retained parapet to no. 55 Wilton Place, general layout alterations, and associated works from RN 19/09981/LBC, NAMELY, to vary the approved drawing numbers to amend the design of the external vent at no. 4 William Street and the removal of a ceiling at third floor level.

Variation of Condition 1 of planning permission granted 11 June 2019 (RN: 18/09167), which itself varied condition 1 of planning permission dated 26 July 2018 (RN:18/09167) for: Alterations including 7th floor roof extension, alterations to office and retail entrances/shopfronts on Great Marlborough Street; reconfiguration of western lightwell elevation, installation of photovoltaic panels, green roofs, new extract ventilation duct and new plant enclosure at roof level and creation of office and residential terraces. Use of lower ground, part ground and part 1st to part 7th floors as offices (Class B1); use of part ground floor for dual/alternative retail (Class A1) or restaurant (Class A3) purposes; reconfiguration of existing flats and provision of one additional flat; use of basement to provide plant, cycle parking/showers waste storage and car parking (site includes 11 Ramillies Place). NAMELY, to allow replace approved revolving entrance door and single glazed door to the office entrance with a pair of glazed swing doors (double doors) to the reception area; replacement of the existing central first floor window to match the approved windows; and introduction of aluminium cladding to the entrances at ground and first floor level.