 Plymouth railway station , which opened in 1877 , is managed by Great Western Railway and also sees trains on the CrossCountry network . Smaller stations are served by local trains on the Tamar Valley Line and Cornish Main Line . First Great Western have come under fire recently , due to widespread rail service cuts across the south @-@ west , which affect Plymouth greatly . Three MPs from the three main political parties in the region have lobbied that the train services are vital to its economy . 
