The service will operate Mondays to Fridays, departing Cork at 06.15 with a journey time of 2h 15min. Currently the fastest services cover the 266km in 2h 30min with all trains stopping at Mallow and Limerick Junction.

Cork-Dublin is IE's busiest inter-city route and ridership increased more than 4% last year to 2.84 million.

Earlier this year IE launched a programme of track improvements on the line, focussing initially on the Hazelhatch – Portlaoise section. IE says the €10m project will deliver improved reliability and consistent 160km/h running on this stretch by the end of next year.

Ultimately IE hopes to implement further enhancements with the aim of reducing Cork – Dublin journey times to less than two hours.