Judges at the Supreme Court are today being asked to decide when land owned by public authorities is immune to the laws relating to town and village greens. Land that has been used by communities for recreation for more than 20 years can be designated as a “town or village green”, limiting building that can take place on it. The five-judge panel is weighing two cases joined into one. One relates to land beside a Lancashire primary school that is owned by the local council, which is also the local educational authority. The other relates to woodland adjoining Leatherhead Hospital.