Town and country planning – Change of use. The defendant local planning authority had been entitled to treat a mooring and pontoon area as a whole as the appropriate planning unit, to find continuous residential use for more than ten years before the application for a certificate of lawfulness of existing use or development, and that the increased number of vessels in residential use had not been a material change. Accordingly, the Planning Court dismissed the claimant's applications for judicial review of the authority's decisions not to issue an enforcement notice and to grant the certificate.