Kieran O'Donnell (Limerick City, Fine Gael) | Oireachtas source

We are told the net interest margin at Bank of Ireland is 2.08%, it is 1.6% at AIB while Ulster Bank's is 2.32%, based on the information we have received to date. The rate at Permanent TSB is below 1% at 0.88%. Ulster Bank's net interest margin is the highest of the banks in Ireland by a significant amount. Why are the rates the bank is offering to customers not more competitive?