I have never used the Trainline App or there services, not sure what the point of using them, they are just selling you the existing train ticket price which the train operating company sets and they apply a admin fee on top for using there service. There have no leverage or barging on the prices of the tickets. Why dont these travellers just buy the tickets from the machine or buy directly from the train company, therefore you would avoid all there nonsense fee's and pressure tactics. they just a third party ticket seller making money out of fee's. there is no reason for there existence!