When did the British Royal Mail begin using bicycles ?
However , Royal Mail did restore the movement of some already - sorted letters by rail in time for the Christmas season that year , contracting with EWS 's competitor GB Railfreight to resume bulk transfer services along the West Coast Main Line between its mail terminals at London ( Willesden ) , Warrington and Glasgow ( Sheildmuir ) using the dedicated Class 325 electric multiple units that had been in operation since 1996 .