Amendments to planning permission dated 23 February 2022 (RN: 21/07541/FULL) which was in itself an amendment to a previous permission for the '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 wall mount air condenser units in an enclosure within the front lightwell underneath the external stair along the Balfour Place frontage instead of within the basement vaults.

Amendments to planning permission dated 26th April 2021 (RN:18/05362/FULL) for Variation of condition 1 and 21 of planning permission dated 12 October 2017 (RN: 17/02923/FULL) for the Demolition and redevelopment behind retained facade to provide a building of two basements, ground, part mezzanine and eight upper storeys accommodating retail (Class A1), office (Class B1) and flexible retail / office (Class A1 / B1) floorspace:to allow, alterations to retained facades including replacement windows to the east and south facades, alterations to facing material at rear elevations, clarification of facade reconstruction at parts of ground, first, sixth and seventh floors, alterations to office entrance, reduction of lightwell size on Great Cumberland Place, and reduction of doorway recesses at building entrances - NAMELY, to amend the wording to include flexible commercial uses use (Class E) at basement, ground and part first floor level and office (Class E) within part first floor level and second to eighth floor levels.

Amendments to planning permission dated 04 October 2022 (RN: 22/05420/FULL) for 'Demolition of the existing mansard roof and removal of plant and escape stair; erection of new double mansard roof extension and rear extension for additional commercial floorspace (Use Class E); and installation of new escape stair, rear balconies, roof terrace and associated works'. Namely, amendment to the wording of condition 6 to remove the requirement to set back railings to the main roof terrace; addition of new condition (20) relating to furniture/ items on the main roof terrace; the removal of the balconies from 4th to 7th floor including the area of roof terrace oversailing the balconies; replacement of balcony doors with windows; addition of railings to window openings; and increase height of 3rd floor openable window.

Amendments to planning permission dated 23rd January 2023 (RN: 22/05428/FULL) for 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, namely to amend the wording of Condition 3 (Code of Construction Practice) to enable early works to be carried out in accordance with the Appendix A dated 22/11/22 signed by the Environment Inspectorate and prior to the discharge of Condition 3.

Amendments to planning permission dated 13th December 2021 (RN: 21/07298/FULL) for Installation of replacement windows at various floor levels on the Langham Place, Great Portland Street, Langham Place West Wing, Langham East Window and Riding House Street elevations. Namely, to amend Condition 1 to correct the list of consented plan references to include one plan which was excluded from the Decision Notice through an administrative error.

Amendments to planning permission dated 13th April 2020 (RN:21/04107/FULL) for Excavation of a basement beneath the front driveway; Relocation of the main entrance from the centre to the left hand side of the property with associated relocation of front door and steps; Infill to the recessed part of the front elevation to bring it in line with the rest of the front elevation; Insertion of new windows to the front elevation at ground and first floors with new dormer at second floor levels; and New front gates for vehicular and pedestrian access including a new central pier. Namely, to amend the description of development

Amendments to planning permission dated 30th September 2020 (RN: 19/09329/COFUL) for demolition of existing structures including storage sheds and redevelopment of existing car park to provide two blocks of three and five storeys providing a total of 21 x Use Class C3 (residential) units and other associated works, including the provision of storage units, car and cycle parking, landscaping, access gates and boundary treatment. Namely, the installation of air bricks, raising of window transoms to all windows, reduction in size of mansard rooflights, raising of parapets around the top of the apartment building by 200mm, introduction of mechanical opening to windows, reduction in number of storage units to allow an increase in size, replacement of low level wall with railings at ground floor level at the rear of the block of flats, reconstruction of the vehicle crossover and amendment to the approved tenure mix from 8 x intermediate units to 8 x social rented units.

Amendments to planning permission dated 23rd March 2022 (RN: 22/00160/FULL) (as amended by non-material amendment dated 19th October 2022 (RN: 22/05369/NMA)) for, 'Demolition of the existing conservatory structure and replacement with a new conservatory with windows to internal lightwell at rear third floor level'; Namely, the addition of a flat roof light.

Amendments to planning permission dated 23 August 2021 (RN:21/03722/FULL) for Replacement of all the windows with aluminium double glazed windows, opening sections and a door to provide access to a proposed roof terrace, installation of a balustrade to the parapet.. NAMELY; to amend the location of the door to the terrace from the kitchen

Amendments to planning permission dated 5th March 2021 (RN 20/08219/FULL) for the Infill extensions at rear ground floor level, alterations to rear fenestration and new roof to rear extension and conversion of one former coal cellar in basement to habitable accommodation. NAMELY, amendment to allow dropping floor level in coal cellars to allow usage as bathroom and storage as proposed, new doorway to allow access into closed-off second cellar.