Without prejudice to any other powers of the railway undertaking, it shall have power to carry on any business usually carried on by a railway company and to do all such other things as are incidental thereto and, without prejudice to the generality of the foregoing, shall have power—
(a)to enter into and carry out agreements with any person for the performance by that person, whether as agent for the undertaking or otherwise, of any functions conferred on the undertaking by this Act;
(b)to consign goods on behalf of itself or other persons from any places in Northern Ireland to any other place whether in Northern Ireland or elsewhere;
(c)to store within Northern Ireland goods which have been or are to be carried by the undertaking;
(d)to enter into and carry out agreements with any other person engaged in the carriage of passengers and goods for the through carriage of passengers and goods under one contract or at a through charge or in the same vehicles or containers.