25Any notice—
(a)which has been given by a public gas supplier under sub-paragraph (1) or (2) of paragraph 8 (use of antifluctuators and valves) of Schedule 5 to the 1986 Act; and
(b)which is in force immediately before the appointed day,
shall have effect on and after that day as if it had been given on that day under sub-paragraph (1) or, as the case may be, sub-paragraph (2) of paragraph 17 of Schedule 2B to that Act by the supplier’s transport successor.