Sch 2 Pt 3 para 2 Greenhouses and agricultural buildings
A building used, subject to paragraph 3, for agriculture, or a building principally for the keeping of animals, provided in each case that— (a) no part of the building is used as a dwelling; (b) no point of the building is less than one and a half times its height from any point of a building which contains sleeping accommodation; and (c) the building is provided with a fire exit which is not more than 30 metres from any point in the building.