Note sure where the CWL management got the 180,000 figure from.
CAA stats for 2005 show 118,718 scheduled pax travelled on the CWL-DUB route (Ryanair and Air Wales) with 2,451 charter pax.
In 2004 the figures were 99,940 and 10,091 respectively.
I presume most of the charter pax were rugby fans going to watch Wales-Ireland internationals.
Even so these figures suggest an ATR (a 42 at that, I believe) may well struggle to meet demand at times.