The Town and Country Planning (General Permitted Development) (England) Order 2015

Class J – use of land etc by the Crown connected with air traffic services

Permitted development

J.  The use of land by or on behalf of the Crown to provide services and facilities in connection with the provision of air traffic services and the erection or placing of moveable structures on the land for the purposes of that use.

Condition

J.1  Development is permitted by Class J subject to the condition that, on or before the expiry of the period of 6 months beginning with the date on which the use began, the use ceases, any structure is removed, and the land is restored to its condition before the development took place, or to such other state as may be agreed in writing between the local planning authority and the developer.