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

A.2    Conditions

Development is permitted by Class A subject to the conditions that any building extended or altered—

(a)shall only be used—

(i)in the case of an industrial building, for the carrying out of an industrial process for the purposes of the undertaking or the provision of employee facilities;

(ii)in the case of a warehouse, for storage or distribution for the purposes of the undertaking or the provision of employee facilities;

(b)shall not be used to provide employee facilities between 7.00 p.m. and 6.30 a.m. for employees other than those present at the premises of the undertaking for the purpose of their employment;

(c)shall not be used to provide employee facilities if a notifiable quantity of a hazardous substance is present at the premises of the undertaking.