Notwithstanding the provisions of section 50 (2) of the [1973 c. 41.] Fair Trading Act 1973 the Director General of Fair Trading may make a monopoly reference, within the meaning of that Act, in respect of services consisting of the carriage of passengers or goods by rail on the railway comprised within Work No. 1 at any time during which functions of the Company under the 1993 Act in respect of the provision of any of those services are vested in a transferee.