any operation would be carried out within 50 metres of any part of an occupied residential building or a building occupied as a hospital or school;

any operation would be carried out within a National Park, an area of outstanding natural beauty, a site of archaeological interest, a site of special scientific interest or the Broads;

any explosive charge of more than 1 kilogram would be used;

any structure assembled or provided would exceed 15 metres in height, or, where the structure would be within 3 kilometres of the perimeter of an aerodrome, 3 metres in height;

in the case of boreholes for locating and appraising the condition of mines, the borehole exceeds 160 metres in depth; or

drilling would be carried out within a protected groundwater source area.