17E+W+SThe repeal by this Act of any provision by virtue of which any enactment applies in relation to a person carrying on a gas undertaking shall not affect the continuing validity of anything done under that enactment before the appointed day; and that enactment shall continue for the purposes of anything so done to have effect on and after that day as if the enactment continued to apply in relation to the Corporation and, after the transfer date, to the successor company as it applied in relation to the Corporation before the appointed day.