Façade repairs, including façade cleaning to all elevations, isolated stonework repairs, redecoration to windows and painted metal fences/gates, isolated repair to slate roof coverings.

Amendments to planning permission dated 11th July 2022 (RN 22/03408/FULL) for the external alterations to the building, including creation of a new roof terrace with installation of a new air conditioning unit at roof level NAMELY handrail to roof terrace perimeter with CCTV camera; amendment to planters to roof terrace; installation of CCTV to front elevation; alterations to first floor window fenestration; reinstate original render finish to ground floor; boundary fence to terrace; and first floor decorative balcony alterations.

Amendments to the planning permission dated 29 September 2020 (RN: 20/03884/FULL) for the variation of condition 1 (approved plans) and removal of condition 9 (coffee bar use restriction) of the planning permission dated 13 December 2019 (19/06852/FULL) which granted a temporary change of use from Office (Class B1) to a sales and marketing suite (Sui Generis) for a period of 5 years with associated internal and external alterations, including: replacement rear extension with terrace above, erection of roof level plant screen, replacement entrance on St Petersburgh Place, insertion of door on Moscow Road, awnings to St Petersburgh Place frontage, erection pergola and fence at rear as well as erection of bicycle and bin store to side. NAMELY, to retain some of the temporary features to the main entrance on St Petersburgh Place , the gates, limestone cladding and three awnings on the St Petersburgh Place frontage.

Retention of the existing air conditioning units, fences, roof extension, an additional window to the rear, and a proposed enclosure for the air conditioning units.

Amendments to planning permission dated 12 August 2021 (RN: 21/02635/FULL) for the 'creation of a new access to the roof and replacement perimeter fence at roof level, NAMELY, to increase the fence height from 1.1m to 1.2m and posts at 1.25m

Construction of a single storey extension at rear lower ground floor level and a single storey extension within the front lower ground floor lightwell area; installation of new air conditioning condenser unit at roof level; enlarged opening for French doors at rear ground floor level and replacement front door; replacement windows/glazing; and replacement terrace decking and fencing.

Construction of a single storey extension at rear lower ground floor level and a single storey extension within the front lower ground floor lightwell area; installation of new air conditioning condenser unit at roof level; enlarged opening for French doors at rear ground floor level and replacement front door; replacement windows/glazing; and replacement terrace decking and fencing; internal alterations.

Amendments to planning permission dated 18th February 2021 (RN:20/06601/FULL) for Variation of condition 1 of planning permission dated 21.5.20 (RN:19/07406/FULL), which itself varied condition 1 and 9 of planning permission dated 20.11.18 (RN: 18/03520/FULL) which itself varied condition 1 of planning permission dated 12 September 2017 (RN: 16/06423/FULL) for, 'Alterations to the existing building including retention & repair of the front and side facades, part demolition & replacement of the rear facade, rear extension of the 2nd-5th floors, removal of existing & introduction of a new 6th floor, introduction of a new set-back 7th floor, extension of the existing basement levels to include two additional basement levels (including one mezzanine level), installation of roof plant & plant screen, public realm works including hard & soft landscaping, removal of the security kiosks, fencing, bollards & gates/barriers to Blackburne's Mews & Culross Street, removal & replacement of 6 No. trees in front of the Grosvenor Square elevation & re-opening of the road on the western side of the Square, all in connection with the use of the building as a hotel (Class C1) with flexible retail/restaurant use at 1st floor, ground floor and basement 1 (Class A1/Class A3/Class C1), flexible restaurant/bar use at 7th floor (Class A3/Class A4/Class C1), leisure/spa facilities within the basement (Class D2/Class C1) & an ancillary ballroom, event spaces, back of house facilities & associated car, cycle parking & servicing facilities accessed from Blackburne's Mews, & other associated works' - NAMELY, to amend Condition 17 to remove reference to the seventh-floor level [requiring public access] and an additional condition to read as follows: The area at seventh floor level designated as a restaurant/bar (Flexible Class A3/A4/C1) must remain open to members of the general public (whether or not they are guests at the hotel or visitors of hotel guests) on not less than 200 days per year

External alterations to the existing building and landscaping to accommodate Tresham Centre for Disabled Children & Young People, includes new plant room with an acoustic enclosure on the roof, new fencing, changes to the cladding of the external escape staircase, full height screens at first floor level.

Alterations at roof level including construction of decking platform surrounded by 1.1m high clear glass fence at the front part of the flat roof facing Golden Square to create a roof terrace and new set of stairs within lightwell for use in association with existing flat (Class C3).