Demolition of an existing single storey timber clad gymnasium building. Construction of a two storey extension to the existing two storey ESO Building, including undercroft car parking, roof mounted plant and photovoltaic panels, ground level external plant area, alterations to the existing building envelope to form roof access, rooflights, windows and doors; and associated works including construction of an earth bunded drainage infiltration basin in the southern section of the site. The extension is to contain improved replacement gymnasium and welfare facilities, office space, laboratories, storage space, and operational consolidation.

Alterations to existing garage and the construction an additional garage and three outbuildings comprising gardeners office and two storage sheds together with associated works.