Regulation 5 Prohibition of hinged doors
(1)
No person shall operate, and no infrastructure controller shall permit the operation of any rolling stock on a railway if the rolling stock has hinged doors for use by passengers for boarding and alighting from the train (other than doors which have a means of centrally locking them in a closed position).
(2)
Paragraph (1) shall not apply to rolling stock which at the relevant time is being exclusively operated other than for the carriage of fare paying passengers.