Certificate of Lawfulness for Hazel Hill Farm: (1) The erection of a building and its subsequent change of use to use as a single dwelling-house (Use Class C3), (2) the conversion and change of use of an underground agricultural vegetable storage clamp to a basement for the dwellinghouse, (3) operational development comprising the installation of a septic tank and drainage system, and (4) the associated use of land as curtilage to the dwelling shown edged red on the application plan.