When I was with EBS, I had just gotten the mortgage and was interested to logon and view mortgage account balance to see how much eye watering interest I was paying daily. Every couple of days (until I stopped looking!), I could see the outstanding balance increase slightly, indicating to me that the interest was added daily to the outstanding amount (capitalised?).
With AIB now, since December, and I was charged interest (i.e. it was capitalised and viewable on the account balance) in December, and nothing in January. Hence, I'm expecting next capitalisation of interest in April, quarterly as above.