3Nothing in this Act or in any order under this Act shall authorise any person, except with the consent of the persons carrying on an undertaking protected by this Schedule, to do any work which, whether directly or indirectly, interferes or will interfere—
(a)with the works or any property which is vested in, or under the control of, the persons carrying on that undertaking, in their capacity as such; or
(b)with the use of any such works or property,
in such a manner as to affect injuriously those works or that property or the carrying on of that undertaking.