There is no easy answer to this really and I would be inclined to recommend that you seek independent, professional advice on the matter to be honest. Some things to consider:
Are your existing pension arrangements sufficient (on a projected basis obviously) to cater for your pension needs? If not then the pension may need prioritisation.
Do you really want to concentrate your investments even further in a single asset class (property) and geographic location (Ireland presumably?)? Most commentators would be more inclined to recommend that individuals build up a mixed portfolio of investments diversified by asset class and geographic location instread unless there was a good reason why concentration was a preferable strategy.
Reducing debt, particularly high cost debt but even lower cost debt such as domestic or investment mortgages, is generally a good idea.
In the greater scheme of things it may be relatively small beans but you should probably aim to maximise your SSIA contributions over the remaining term of the scheme before doing anything else. The maturing fund can then be used for whatever purposes you decide (e.g. reduce mortgage(s) or top-up pension).