Here is the response I received from Welfare.ie-
Contributions paid by you in the U.K. will stand to you towards
a U.K. pension. Any queries you may have regarding U.K. pension
qualification should be addressed to -
Pensions and Overseas Benefits Directorate
Tyneview Park, Whitley Road,
Benton
Newcastle upon Tyne NE98 1BA
England.
Direct Lines (0191) 218 3889
(0191) 218 3894.
Contributions paid by you in Ireland will stand towards an Irish
pension.
You can request a copy of your Irish Contribution Record from our
Records Section in Gandon House at any stage.