Demolition of Lodge buildings, garden works buildings, existing hard landscaping on Ramparts and internal elements. Refurbishment, alteration and extension of existing building, including external glazing over internal courtyards, insertion of ensuite bathrooms and lifts, and extension to existing basement to provide residential, teaching and office accommodation with associated structural works. Erection of replacement Lodges and single storey garden room. Creation of underground accommodation and sunken courtyard within the grounds (east) to provide additional residential ensuite bedrooms. Erection of a single storey glazed pavilion building (with new basement) within the grounds (west) to provide additional teaching and office accommodation. Erection of new gardeners outbuildings. New landscaping of garden and Ramparts; removal and re-instatement of boundary walls; removal and reinstatement of front ramps; and provision of cycle parking. (Amended description) (Additional and amended plans and supporting information).