Amendments to planning permission dated 23 December 2022 (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 enable the removal of specified louvres, relocation of the generator, façade updates at ground floor level, installation of safety balustrading, relocation of the consented UKPN access, creation of a separate ground floor access for the crown amenity space and installation of additional sliding doors at Level 30.

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 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).

Amendments to planning permission dated 07 August 2020 (RN: 19/07063/FULL) for use of the building (lower ground and ground of nos. 78 and 80 as a restaurant (Class A3), use of lower ground, ground and first floors of no. 82 as a public house (Class A4) and use of upper floors as office (Class B1), together with extension to the rear of the existing buildings and the installation of a lift, provision of a roof terrace, installation of plant equipment, facade treatments, installation of a lift overrun and associated works (site includes 78-82 Duke Street). (Part of land use package with 18 Balderton Street and 64-66 Duke Street); NAMELY, The retention of the existing rear staircase wall at ground to second floor levels and the use of brick slips to match existing external wall finishes.

Amendments to planning permission dated 7th August 2020 (RN 19/07063/FULL) for, 'Use of the building (lower ground and ground of nos. 78 and 80 as a restaurant (Class A3), use of lower ground, ground and first floors of no. 82 as a public house (Class A4) and use of upper floors as office (Class B1), together with extension to the rear of the existing buildings and the installation of a lift, provision of a roof terrace, installation of plant equipment, facade treatments, installation of a lift overrun and associated works (site includes 78-82 Duke Street). (Part of land use package with 18 Balderton Street and 64-66 Duke Street)'; NAMELY, the omission of the accessible WC from ground floor level, provision of an additional WC at first floor, reconfiguration of the WCs, waste storage and kitchen at lower ground level and associated omission of cycle storage for the retained public house.

Amendments to planning permission dated 19 November 2018 (RN: 18/07021) for: Demolition of the rear facade of Henrietta House and the erection of a seven-storey extension at above ground floor level to create new office floorspace, installation of a deck over the existing servicing yard to the rear, relocation of the existing fire escape stair from the rear of 91- 95 Wimpole street, demolition of part of the existing plant enclosure at roof level of Henrietta House and erection of new office floorspace, external alterations to the ground floor level elevations of Henrietta House on Welbeck, Wimpole Street and Henrietta Place, installation of photovoltaic panels at roof level, installation of a new green walls to the rear and side elevations to the new rear extension to Henrietta House and all associated works (Phase 1). Removal of the existing plant enclosure of 91-95 Wimpole Street for the erection of a two-storey roof extension and associated works (Phase 2), all in connection with the existing office use (Use Class B1) (SITE INCLUDES 91-95 WIMPOLE STREET) NAMELY, height of zinc cladding on south elevation reduced in height by 0.2m, areas of approved zinc cladding and rendered walls omitted and existing material retained, extent of 8th floor plant enclosure extended to the north by 0.4m, UKPN entrance reconfigured, new decorative screen to rear courtyard elevation, rear wall of new lift to be clad in white painted steel instead of white render.

Amendments to planning permission dated 7 August 2020 (RN: 19/07063/FULL) for Use of the building (lower ground and ground of nos. 78 and 80 as a restaurant (Class A3), use of lower ground, ground and first floors of no. 82 as a public house (Class A4) and use of upper floors as office (Class B1), together with extension to the rear of the existing buildings and the installation of a lift, provision of a roof terrace, installation of plant equipment, facade treatments, installation of a lift overrun and associated works (site includes 78-82 Duke Street). (Part of land use package with 18 Balderton Street and 64-66 Duke Street), NAMELY to allow increase in width to the service door from George Yard; introduction of ventilation louvres to the Duke Street and Brown Hart Gardens shopfronts; replacement of approved door to roof terrace with sash window at third floor level; marginal increase in height of the approved lift overrun, in addition to a green roof; reconfiguration of approved mechanical plant at fourth floor level and introduction of a green roof; confirmation of size of mechanical plant at third floor level plant area; rationalisation of main roof plant and confirmation of size of mechanical plant; increase in roof height of 80 and 82 Duke Street; increase in height of kitchen extract duct in roof area to 80 Duke Street.

Amendments to planning permission dated 19 March 2018 (17/09368/FULL) for Variation of Conditions 1, 13, 16, 7(a), 9, 38 & removal of Condition 40 of planning permission dated 10 July 2017 (16/09548/FULL) for; Alterations to the existing building including creation of new entrances; alterations to bottle balustrades & parapets; extensions to create three additional storeys; two additional basement storeys; partial demolition & reconstruction of the central wing; demolition, reconstruction & extensions to the Triangular Courtyard facades; external alterations to Quadrangle facades; creation of external terraces at fourth, fifth, sixth & seventh floor levels; addition of entrance canopies; alterations to security walls & bollards & the removal & replacement of street trees; all in connection with change of use from offices (Class B1) to a hotel (Class C1) comprising up to 125 hotel bedrooms/suites with flexible hotel/retail/restaurant/bar use at part ground floor (Class C1/A1/A3/A4), flexible hotel/restaurant use at part lower ground, part ground & part second floors (Class C1/A3); flexible hotel/bar use at part fifth & part sixth floors (Class C1/A4); flexible retail, leisure, restaurant or bar use at part ground floor (Class A1/D2/C1/A3/A4), leisure/spa facilities within the basement levels & part lower ground floor (Class D2/C1) ancillary ballroom, event space & meeting rooms, food & beverage facilities, back of house facilities & associated car & cycle parking & servicing facilities; creation of up to 88 residential dwellings (Class C3) with ancillary communal amenities, & associated car parking, cycle parking & servicing facilities; namely, amendments to the Quadrangle courtyard paving, amendments to internal layout of two residential units; installation of additional windows to fifth floor; installation of external grilles to the east and north elevations.

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.