29Any notice—
(a)which has been given by a public gas supplier in England and Wales under section 54, 55 or 57 of the [1991 c. 22.] New Roads and Street Works Act 1991, or in Scotland under section 113, 114 or 116 of that 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 by the public gas supplier’s transport successor.