The issues in the news at present relate to DB schemes where the pensions are paid directly out of the scheme assets. Your is different in that the scheme bought an annuity for you, so your only worry is if the annuity provider company goes bust, rather than just the DB scheme.
Presumably your annuity is with one of the "High Street" Irish pension companies, e.g. Irish Life, New Ireland etc? In the event that one of these went bust, the most likely scenario is that another company would buy it out and would therefore have an obligation to continue paying your annuity.