If you are on an AIB standard variable mortgage the best thing to do now is to get on an AIB tracker rate , that would be at 3-3.1% rather than 3.5-3.6% . Ring AIB and threaten to leave them for NIB or Bank of Scotland. That one phone call should get you a reduction on the monthly payment amounting to c. €50 PM on a €150k mortgage.
Then do as Bank Manager says although his Point C is very complex and can lock you into a crappy pension scheme where you are being totally gouged by management fees by morons calling themselves investment managers BUT its a tax break. Take extensive widescale advice before locking yourself into a pension scheme that could be crap.
You could then round up the mortgage payments to say €1000 a month anyway (on a €150k mortgage) and reduce your term by systematically overpaying but keep some cash liquid in case you need to fatten up the pension .
it helps if
a) you need short term funds and
b) in case you do get a pension as you were correctly advised and can check in a lump sum at the beginning, keep more than €2k in the slush fund