This morning's 0545 was quite late leaving Sligo so provided quite an interesting opportunity to see quite how much slack was in the timetable. Thanks to Irish Rail's excellent webservice, it's quite easy to check how A901 got on.
Here are the highlights
Left Sligo 0608 - 23 minutes late
Left Edgeworthstown 0720 - 13 minutes late
Left Enfield 0809 - 18 minutes late - stuck behind relief (about 10 minutes wait)
Arrived Connolly 0853 - 6 minutes late
I couldn't be accurate about the extra delay incurred at Enfield while we were stuck behind the relief train but I'd say it was of the order of 10 minutes making for a total of 33 minutes delays to the service. Yet it managed to recover all but 6 minutes of the delay on a service at the busiest time of that day that has no crossings to make.
Yet, they feel the need to add yet another 10 minutes to the running time of this service in the abandoned timetable.