Erection of a part one and part two storey extension to the existing refurbished Art Block (former stable building) including 2no glazed walkway connecting to the existing principal school building; alterations to the roof within the existing school building to include a flat roof infill between the existing ridges to the north of the school, and flat roof infill to the south of the school adjacent to the existing lift shaft; alterations to the western elevation of the art block to include the installation of new glazing, zinc panels and windows to replace the existing windows; installation of new steps to replace the existing steps within the proposed links to eastern elevation; associated external alterations.