In simple terms:
Departures at 45 mins past the hour = many potential customers will not wait for a departure (they are potentially at home 15 mins before it leaves) therefore service doesn't thrive.
Departures 05 min past the hour = untenable for most current users therefore service loses any current business.
Departure 20 mins past the hour = most current users can still use service and extra Nenagh throughput maintained.
Can somebody wiser than I explain to me WHY there is no win/win situation here. Humans have transplanted hearts and put men on the moon; why can't we run a train up a track at a convenient time? (And cross them over someplace, conveniently).
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