External alterations, including demolition of the existing glazed entrance box, remodelling entrance and introduction of fenced courtyard garden to Lancelot Place ground floor facade; new terrace at Level 6 and 7 on Brompton Road facade; and new plant and plant screen at main roof level.

Excavation of basement level beneath footprint of existing house with walk on rooflights; Rebuilding of bathroom extension at lower ground floor; Erection of extension at ground floor level over octagonal wing and creation of new parapet; Erection of infill extension on northeast elevation; Remodelling of bay on southeast elevation at lower ground floor level; Erection of replacement dormer; Demolition of existing retaining walls on south east elevation and eastern lightwell and construction of new metal escape stairs in these location; Replacement of windows; Rationalisation of drainage, repair of stucco render, repair/ refurbishment and part replacement of existing roof, refurbishment/ replacement of existing chimney and pots; Installation of Plant Machinery; Erection of bin and bike store to front garden; and associated external alterations.

Demolition and replacement of existing fifth floor, demolition of existing plant room, and erection of a single storey roof extension at sixth floor to 2-6 Stanhope Row with replacement windows, terraces at fifth and sixth floors and remodelling works; demolition of 16 Stanhope Row, 16a, 16b and 17 Market Mews, excavation at basement level and erection of a four-storey (plus part basement floor) replacement building, all to provide an 82-bedroom hotel (Class C1). Demolition of 37 Hertford Street and erection of replacement building (basement to fourth floor mansard roof plus rooftop plant enclosure); and Internal and external alterations to 36 Hertford Street including demolition and remodelling of existing mansard roof; together with excavation at basement level to 36 and 37 Hertford Street to lower existing basement slab level; all to provide 16 residential dwellings (Class C3) along with provision for cycle parking, terraces, refuse storage and rooftop plant, together with other associated works.

Variation of condition 1 of planning permission dated 27 October 2021 (20/05884/FULL) for 'Partial demolition and remodelling of the principal facades and fifth floor and addition of two storeys for office use and provision of retail, restaurant and gym uses at ground and basement levels. Formation of terraces on sixth and seventh floors for office use and associated plant and cycle parking'. NAMELY, to amend the drawings and create a new roof terrace on roof of 7th floor.

Demolition of part and remodelling of the existing ground floor rear extension, and erection of a new ground floor side extension.

Partial demolition and remodelling of the principal facades and fifth floor and addition of two storeys for office use and provision of retail, restaurant and gym uses at ground and basement levels. Formation of terraces on sixth and seventh floors for office use and associated plant and cycle parking.

Variation of conditions 1 and 15 of planning permission dated 23rd March 2018 (RN 17/08716/FULL) for the variation of condition 1 and removal of condition 33 and 34 of planning permission dated 20 April 2016 (RN: 15/06448) for the 'Demolition of all existing buildings and comprehensive redevelopment to provide a mixed use development accommodated in a single building arranged around a central courtyard of lower ground, ground, eight upper floors, rooftop plant and basements. Use of new building for hotel comprising up to 190 guest rooms, restaurants/bars, ballroom, function rooms, hotel leisure/spa facilities, ancillary and back of house spaces (Class C1), 24-28 residential dwellings including ancillary residential leisure and amenity facilities (Class C3) and retail (Class A1), car and cycle parking with access from Grosvenor Crescent and Halkin Street, refuse, delivery and circulation spaces within basements and other associated works. (Site includes Yorkshire House, Grosvenor Crescent, 3, 4, 5 and 8 Pembroke Close and 12 Halkin Street London SW1)'. NAMELY, to amend the approved drawing numbers to allow changes to the approved scheme to be incorporated into the permitted scheme; the addition of car detailing in the car park; the remodelling of the UKPN substation pavilion on Grosvenor Crescent to introduce a revised design of the Pembroke Horn and a secondary entrance; details of design of the Chinese restaurant door on Grosvenor Crescent; and minor amendments to the design of the facades.