Any body corporate carrying on in Great Britain any business or undertaking shall, whether they are public utility undertakers or not, have power and be deemed always to have had power, under any enactment, order, charter, memorandum or articles of association or other document regulating their powers and duties, to take any such measures in relation to their business or undertaking as public utility undertakers, or any class of public utility undertakers, are or can be authorised or required to take under any of the provisions of this Act.