Increasing the ridge height of the main roof by 0.5m; changing the roof finish from asbestos-based corrugated sheets to low-profile fibre cement slates including 5no rooflights in the side roofslopes; erection of a new dormer with 10no windows, 2no doors and 1no rooflight in the new flat roof to form a new second floor level; installation of 3no high level obscure glazed windows to the rear elevation at first floor level; replacement of existing window with a new enlarged window covering part of the ground and first floor level to the front elevation (above the front entrance doors); relocation of 4no air conditioning units for food refrigeration from ground floor to second floor exterior; retrospective change of use from photographic studio (Sui Generis) and office (Class B1) to commercial use (Class E) for the operational and administrative functions of food storage, preparation, packaging, online sales and distribution with a smaller photographic/video studio (Sui Generis).