Two-storey extension including roof-level plant along the Bressenden Place façade to provide a new office entrance pavilion (Class E), the provision of Class E office / retail accommodation, remodelling of the crown of Portland House and creation of a setback rooftop extension to provide office amenity (Class E) and an outdoor terrace, reconfiguration of the second floor plant accommodation fronting Cardinal Place, relocation of the zephyr on Bressenden Place, provision of cycle parking, public realm and associated works including window replacement and the application of a new façade treatment.

Removal of external facades and re-cladding to Oxford Street and New Bond Street elevations, realignment of main shopfront access along Oxford Street, replacement of existing glazing and window framing to Woodstock Street elevation and at upper levels of southern elevation, replacement of rooftop plant and reconfiguration of other structures at roof level and installation of areas of brown and green/blue roofs all in connection with the continued use of the building for retail and offices purposes (Class E).

Amendments to planning permission dated 27th July 2021 (RN:21/03134/FULL) which varied conditions 1 and 11 of planning permission dated 13 February 2019 (RN: 18/07715/FULL) for the removal of existing third and fourth floor levels and roof top structures and partial demolition of Shelton Street elevation (third floor only); construction of new floorspace and internal reconfiguration resulting in a part five and part six storey building with roof top plant enclosure, to provide flexible commercial use including retail (Class A1), financial and professional services (class A2) restaurant (class A3), office (class B1) and /or assembly and leisure (class D2) at basement and ground floor level and office use (Class B1) at first to fifth floor levels; refurbishment of external elevations; roof terraces, plant, cycle parking and facilities for access and servicing. Namely, introduction of two louvre panels to Dryden Street elevation; replacement of concertina door with roller shutter to loading bay on Arne Street; adjustment to mansard roof profile on Drury Lane elevation; introduction of Automatic Opening Vent above internal staircase at roof level; introduction of low level plant screen and service riser weathering dogboxes around Stair 01 roof edge; introduction of silicon joint mullion to glazing to entrance on Arne Street elevation; introduction of mullions to fire centre rated windows on Shelton Street elevation; adjustments to external light fittings to façade at ground floor level; and amendments to lighting to external terraces.

Amendments to planning permission dated 28th October 2022 (RN: 22/04598/FULL) for Alterations to the building including installation of a new shopfront; infilling of the lightwell at rear lower ground and ground floor levels, extension at rear fourth floor level, creation of terrace areas at rear first, fourth and fifth floor levels; installation of a high level extract on the rear elevation, new plant with associated screening and PV panels at main roof level; replacement windows; and associated external works. Use of part ground and basement floors as retail, restaurant or office (Class E). Namely, proposed amendments including the size and location of a number of windows shown on the south and rear elevations, the coping stones added around the terraces, the fire protection treatment of the staircore, the extent of the render finish shown on the south and rear elevations, the inclusion of the rear escape staircase at lower ground level and an escape stair at roof level, the number of rooflights shown on the first-floor terrace and a slightly different roof configuration.

Alterations to the building including installation of a new shopfront; infilling of the lightwell at rear lower ground and ground floor levels, extension at rear fourth floor level, creation of terrace areas at rear first, fourth and fifth floor levels; installation of a high level extract on the rear elevation, new plant with associated screening and PV panels at main roof level; replacement windows; and associated external works. Use of part ground and basement floors as retail, restaurant or office (Class E)

Variation of Conditions 31 and 32 of planning permission dated 30 March 2022 (21/07642/FULL) for the 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 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; and amendments to car parking provision (retention of the public car park), alterations to the cycle parking provision and basement layouts and reduction in flexible commercial floorspace; namely, to amend the wording of Conditions 31 and 32 to require the landscaping of the first floor terrace to be carried out in accordance with the submitted details.

Amendments to planning permission 23rd February 2022 (RN: 21/07541/FULL) for, 'Erection of infill extension at basement level in order to enlarge existing office (Class B1), use of part ground floor on Mount Street elevation as a shop (Class A1) accessed from existing bay, erection of roof extension to enlarge existing flat (Class C3), insertion of new windows and doors on the north and east elevations, creation of a residential terraces at third floor level and provision of plant within existing vaults'; NAMELY, to enable internal layout changes to lower ground floor offices, ground floor office and residential entrance and flats 1, 2, 3 and 4.

Variation of condition 1 of planning permission dated 4th December 2020 (RN 20/02024/FULL) for the Seven-storey rear courtyard extension of the existing office building at the basement, ground, first, second, third, fourth and fifth floor levels; a two storey extension on Harewood Avenue at 7th and 8th floor level and an extension to the Harewood Row/Lisson Grove elevations at third, fourth and fifth floor level for additional office space (Class B1), comprising the relocation of the existing mechanical plant and services; change of use of the existing office space (Class B1) to flexible retail space (Class A1/B1) at part basement, part ground floor at the corner of Harewood Avenue and Harewood Row; upgrade works to the existing entrances along Harewood Avenue and Harewood Row; refurbishment of the existing vehicle entrance on Lisson Grove including an enclosed loading bay; reconfiguration of car parking and cycle parking at the basement level; and the introduction of planting and landscaping to the existing entrance on Marylebone Road. NAMELY, to incorporate amendments including replacement windows, amendment to Marylebone Road and Harewood entrances, change to cladding on rear facade, increased extents of green roofs/planted terraces and increase to the extent of the courtyard facade.

Amendments to planning permission 4th September 2020 (RN: 20/03854/FULL) Demolition and replacement of existing fourth floor, demolition of existing plant room, and erection of a single storey roof extension at fifth floor and rear extension at second to fifth floor levels in connection with existing office (Class B1) use, provision of new main office entrance, flexible use of part ground and basement floor for either retail or office use (Class A1/B1), creation of roof terrace at fifth floor level, provision of cycle parking spaces and facilities, roof plant and associated external alterations, including replacement windows. Namely, to introduce minor additional demolition in isolated locations and reduce the scope of demolition in other areas, and to replace a door at ground floor level on the south elevation with a louvre

Amendments to planning permission dated 30 March 2022 (21/07642/FULL) for the variation of Conditions 1, 20, 21, 23, 24 of planning permission dated 16th March 2021 (RN 20/04933/FULL) for the 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 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 car parking provision (retention of the public car park), alterations to the cycle parking provision and basement layouts and reduction in flexible commercial floorspace; NAMELY, Street scape enhancements (Front elevation - Carlton House Terrace and Facade realignment); Amenity enhancements (Inclusion of glazed doors to external terraces (west elevation), external terraces and Level 10 Roof Access) and Detailed design and technical amendments (Widening of the central 'core strip' and Balustrade Position at level 10).