Sent off a change of interest rate request with BOI.
Currently on 5yr 3.1% <60% LTV.
So got offered 5 different options from 1yr 2.9% to 10yr 3.3% and a few in between.
Only one option gave a saving of a whole €5!
So will look elsewhere. Although looking to get a substantial loan for a wedding soon enough so that might hold things off for a bit.