The Sligo tanks had a reputation for being heavy on coal. They are not passenger locos (90% of SLNC passenger traffic was diesel by time of their arrival in 51) but designed for the hard slog of hauling 25 wagons of cattle over a badly laid 45 mile long rollercoaster. The UTA never used them, even when less than a decade old, for anything other than freight in regular service. 131 is ideal for the RPSI’s Dublin runs with the necessary grunt and acceleration- arguably a U would be even better ….if only we had one!