There is, FWIW, a plan to improve that (https://www.irishtimes.com/ireland/2026/06/22/funding-to-cut...), though mostly on the Republic side of the border.
(The Rail 2050 plan plans to bring it dow further to 90 minutes, and up the frequency to once every 30 mins from once an hour, but that's fairly speculative at this point.)
There is, FWIW, a plan to improve that (https://www.irishtimes.com/ireland/2026/06/22/funding-to-cut...), though mostly on the Republic side of the border.
(The Rail 2050 plan plans to bring it dow further to 90 minutes, and up the frequency to once every 30 mins from once an hour, but that's fairly speculative at this point.)