Partial demolition, refurbishment and extension of the existing building comprising removal of the Berners Street facade and stepped rear extensions at third to seventh floor levels; creation of external terraces; removal of existing mews storage unit and infilling to mews building; recladding of facades; installation of new plant equipment; new cycle parking and facilities; and associated works. Use of the building for office use (Class E) (excluding ground floor front) and/or provision of retail (Class E), restaurant (Class E), cafe (Class E) / gallery (Class F1) and/or wine bar / drinking establishment use (Sui Generis) at ground floor, and use of part lower ground (front) as flexible retail (Class E), restaurant (Class E), gallery (Class F1), wine bar / drinking establishment (Sui Generis), medical (Class E), office (Class E) or gymnasium (Class E).