Scheme approved. Extension to existing office (Class B1) at rear third, fourth and fifth floors including at Grosvenor Hill, erection of sheer single storey fourth extension to front of No. 74 Grosvenor Street, replacement of facade and installation of balconies at fourth and fifth floors on Grosvenor Hill, installation of plant rooms at roof levels, terraces and green roofs at fourth floor and fifth floors, and new surfacing to highway fronting Grosvenor Hill. New Substation at front lower ground of No. 75 Grosvenor Street.