We are two people travelling to Ireland in August. During our trip, we will be booking first class train tickets from Dublin to Belfast (one way) and standard class train tickets from Killarney to Dublin (one way).
In total, we will be travelling with two large spinner suitcases (one measuring 29" x 20.5" x 12" and the other 31.5" x 19.5" x 11") and two carry-on sized spinner suitcases (both measuring 21.5" x 15.5" x 9").
Will there be enough space on the train to accommodate all of our luggage on both the Dublin-Belfast route (first class) and the Killarney-Dublin route (standard class)? If so, is there a risk of us not having enough space for our luggage if the trains are very full?