The Town and Country Planning (General Permitted Development) Order 1995

A.1    Development not permitted

Development is not permitted by Class A—

(a) unless—

(i) in the case of school, college or university buildings, the predominant use of the existing buildings on the site is for the provision of education, or

(ii) in the case of hospital buildings, the predominant use of the existing buildings on the site is for the provision of any medical or health services;

(b) where the cumulative total floor space of any buildings erected on a particular site (other than the original school, college, university or hospital buildings) would exceed 10% of the total floor space of the original school, college, university or hospital buildings on that site;

(c) where the cumulative total cubic content of buildings erected on a particular site (other than the original school, college, university or hospital buildings) would exceed 250 cubic metres;

(d) where any part of a building erected would be within 20 metres of the boundary of the site;

(e) where, as a result of the development, any land, used as a playing field immediately before the development took place, could no longer be so used.