Yes, it was lack of steam.
One possible solution is to operate Santas out to M3 Car Park Pace, or whatever they call that halt near Dunboyne, where at least it's out of the way.
However, IE might bear in mind that if ever a system is brought into being which involves one operator having to compensate the other, the number of minutes of delay caused by the RPSI to their trains, is heavily outweighed by the number of minutes where the RPSI is delayed by IE issues! And we tend not to hear much about that...
This year's May tour at Claremorris, for example.
Yours sincerely
Disgruntled, Bunclody.