B.1 Development is not permitted by Class B if—
(a)the gross floor space of the building or enclosure erected would exceed 20 square metres;
(b)any part of the building or enclosure erected would be—
(i)within 20 metres of any boundary of the curtilage of; or
(ii)above or below,
any building used for any purpose within Part C (residential premises or institutions) of the Schedule to the Use Classes Order or as a hostel;
(c)the height of the building or enclosure would exceed 2.5 metres;
(d)the development would be within the curtilage of a listed building; or
(e)the development would be between a shop front and a highway where the distance between the shop front and the boundary of the curtilage of the premises is less than 5 metres.