After winning individual silver and bronze medals at the five previous championships, Grovdal made it a Norwegian senior double as she finished 10 seconds clear of Sweden’s Meraf Bahta, with Germany’s Alina Reh taking bronze.
Jessica Judd’s fourth place helped Great Britain win the senior women’s team title as Jennifer Nesbitt and Jessica Gibbon were the other scorers in 10th and 11th place.
Olympic women’s 800m finalist Alex Bell’s sensational penultimate leg was pivotal to Great Britain’s mixed relay win as the Irish hosts were run out of the medals in fourth after having a big lead at halfway.
The victorious British quartet also included Hannah Nuttall, Luke Duffy and Ben West, whose final leg built on Bell’s remarkable 1500m lap as she brought the British from sixth spot to leading at the final handover.
Ireland’s sole gold medal came in the men’s under-23 team event as Darragh McElhinney took individual silver behind impressive Great Britain winner Hicks.
The hosts also secured team silver in the men’s under-20 event as Great Britain clinched the gold by a single point thanks to ninth, 10th and 15th places from Will Barnicoat, Hamish Armitt and Henry McLuckie.
European Under-20 3,000m champion Nick Griggs was a big Irish medal hope in the under-20 race but a stitch on the second lap put paid to his hopes as he had to settle for 16th.
Abdel Laadjel was the leading Irish under-20 men’s finisher in sixth – 37 seconds behind dominant Danish winner Axel Christensen.
Megan Keith’s individual success for Britain in the women’s under-20 race also helped secure team bronze as she finished three seconds clear of Norway’s Ingeborg Ostgard.