Be aware that unless Macker 1 has more up to date information, Galway cathedral car park were not allowing overnighting in sept 2023. Check post 95 of thread ‘Galway overnight’ on motorhomecraic.com Galway is notorious for being anti Motorhome, choose your parking carefully.
Also Overnighting in the Castle island car park in Newcastle is technically not permitted, but seems to be tolerated. I have no knowledge of anyone being ticketed.
Davy