1) This service runs fewer than 5 times per day
2) The destination has a direct service to Glasgow (Queen Street or Central)
3) The origin does not have a direct service to any Cardiff station
4) The traction is 100 mph capable
5) This service has fewer than 5 intermediate stops
6) The unit is coupled in multiples of 3 (e.g. 313, 185, 170)
7) One can travel the entire length of this service between the hours of Midnight at 06:00 am.
8) Both the origin and destination stations are served by a rapid transit (light rail, subway, tube, metro etc) service.