AIB Group plc (ISE:A5G) has entered exclusive talks with NatWest Group plc (LSE:NWG) to acquire about EUR 6 billion ($6.3 billion) of Irish tracker mortgage loans as the British group looks to complete its exit from Ireland. NatWest announced a little more than a year ago that it was winding down its underperforming Ulster Bank business, which had a loan book amounting to about EUR 20 billion. AIB said that any potential deal for the mortgages, which track the European Central Bank interest rate, remains subject to negotiation.