They beat the previous mark by three seconds.
Portarlington's Shane Ryan was part of a record breaking performance by Ireland's mixed 4-by-100-metres medley relay team.
They swam 3:49.08 to beat the previous record by three second in Budapest a short time ago.
It gave them a 5th place finish in their heat and 13th place finish overall from 27 competitors.
Darragh Greene, Ellen Walshe and Danielle Hill were also part of the team who are looking to qualify for the Olympics.
🔥 NEW IRISH SENIOR RECORD 🔥
— Swim Ireland (@swimireland) May 20, 2021
Mixed 4x100m Medley Relay
3:52.38 ⏩ 3:49.08
Shane Ryan, Darragh Greene, Ellen Walshe and Danielle Hill just miss the cut for the LEN European Aquatics Championships FINAL!
Results➡️https://t.co/JG2jmOmurh pic.twitter.com/96eI1uKuUM