Maxalt
You don't seem to understand how a low-fares airline works. As the plane fills up the price goes up for the remaining free seats. Due to high demand on this day the seat prices are high. There are 3 flights per day on the Dublin to Liverpool route and the first 2 have less than 25 seats available for booking. These seats are always the most expensive. Thats how low-fare airlines make their money. It's not rocket science