A rather work stained 73050 heads away from Poole in Dorset bound northwards via the Somerset and Dorset line to its home at Bath . Standard Class Five 73050 had come to Bath Motive Power Depot as a newly built at Derby locomotive in June of 1954 but was a month late in arrival at what was to be its home due its appearance as an exhibit at the Willesden International Railway Congress Exhibition , joining sister engines 73051 and 73052 which had arrived at Bath as scheduled a month earlier in May , 1954 . The number of Standards working the Somerset and Dorset line increased in the later years , with the Class Fives proving themselves a prime source of Motive Power on the heavy passenger workings , until through services were terminated after the 1962 Summer Timetable