Initially the railway was to be used for individual training but later it was used for training complete railway operating companies who would work the line for a week at a time. Two such companies were Canadian. From July 1941 the Melbourne training regime was linked with that at Longmoor. Basic training took place in Hampshire before transfer to Melbourne where railway engineers undertook eight weeks training and construction engineers undertook 16 weeks training, which included eight weeks at the Kings Newton bridge building school. By the end of 1944 the additional facilities were no longer needed and the line was ready to hand back to the LMS.