Is there enough spare locos is another question. 18 071s, 1 confined to Inchicore, 3 in overhaul, 2 needed daily for the taras, leaves about 12 for current freight flows IWT, timber and DFDS and PWD duties plus wagon transfers.
There is 22 active 201s, 11 stripped of major parts, 1 damaged waiting repair for over 2 years, 4 needed daily for the Enterprise including a spare, 9 needed daily for Mk4s including a spare at Inchicore and Cork. Leaves 7 over for IWTs, timbers and DFDS freights.
Fairly tight if there was another freight flow added.