21. If a regulated rail vehicle or train is fitted with telephones for the use of passengers then—
(a)the vehicle or train shall comply with the requirements of paragraph (2), or
(b)the operator shall assist a disabled person in a wheelchair by providing on request a mobile telephone for use in that person’s wheelchair space.
(2) The requirements are—
(a)at the telephone nearest to a wheelchair space the top of the telephone equipment shall be not more than 1,400 millimetres vertically above the floor; and
(b)the passageway between the wheelchair space and that telephone shall be not less than 850 millimetres wide at any point and provide a space adjacent to that telephone for the disabled person in the reference wheelchair to turn the wheelchair around through one hundred and eighty degrees.