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

B.2    Conditions

Development is permitted by Class B subject to the following conditions—

(a) the development shall be carried out in accordance with the details in the notification referred to in paragraph B.1(b), unless the mineral planning authority have otherwise agreed in writing;

(b) no trees on the land shall be removed, felled, lopped or topped and no other thing shall be done on the land likely to harm or damage any trees, unless specified in detail in the notification refered to in paragraph B.1(b) or the mineral planning authority have otherwise agreed in writing;

(c) before any excavation other than a borehole is made, any topsoil and any subsoil shall be separately removed from the land to be excavated and stored separately from other excavated material and from each other;

(d) within a period of 28 days from operations ceasing, unless the mineral planning authority have agreed otherwise in writing—

(i) any structure permitted by Class B and any waste material arising from other development so permitted shall be removed from the land,

(ii) any borehole shall be adequately sealed,

(iii) any other excavation shall be filled with material from the site,

(iv) the surface of the land shall be levelled and any topsoil replaced as the uppermost layer, and

(v) the land shall, so far as is practicable, be restored to its condition before the development took place, including the carrying out of any necessary seeding and replanting,

and

(e) the development shall cease no later than a date six months after the elapse of the relevant period, unless the mineral planning authority have otherwise agreed in writing.