Proposed alterations to door and window openings, construction of infill one storey rear extension within the lower ground floor courtyard and erection of a conservatory. Removal of a non-original pitched roof above part of the existing lower ground floor bathroom and replacement with a flat roof and glazed balustrade to form an extension to the existing terrace at this level.

Replacement of metal mesh and door and restoration of the Snowdon Aviary to encompass new monkey species, apparatus and informal housing for aviary species, safety and balustrade alterations to 'M' bridge, replacement of concrete shelter and erection of new animal house annex and links, alterations to the education building to the west of the aviary, removal and replacement of trees and landscaping alterations including installation of new gate for construction and emergency vehicles, together with demolition of north pheasantry aviaries and re-landscaping. (Linked to 20/02586/FULL).