Demolition/relocation of existing structures, alteration of the existing cottage, extension to provide a replacement dining area and WCs, construction of 3 x greenhouses, construction of education centre, new opening in the existing boundary wall, raising the boundary wall at the east end of the site, finials to existing gate piers, construction of covered ways and relocation and conversion of the gardeners' shed to create WCs & re-build section of damaged south wall & new gate