Avanti West Coast has been called on to make "significant improvements" ahead of the funeral of Queen Elizabeth II.
Mayor of Greater Manchester, Andy Burnham, and leader of Manchester City Council, Bev Craig, have written to the operator to voice their concerns ahead of the event on Monday, September 19.
The company has been under pressure for several weeks after it cut its timetable and has been delaying releasing tickets for the services it is running.
