Ulster Bank chief to waive bonus over IT glitch The problems, which saw salaries fail to appear in accounts, holidaymakers unable to access cash at overseas ATMs and customers' household bills go unpaid, have been a public relations disaster for the bank, Ireland's third-largest lender. Unlike its parent group and UK sister bank NatWest, Ulster Bank is still battling to get on top of a huge backlog of failed payments. Chris Sullivan, an executive at Ulster Bank's parent company, the Royal Bank of Scotland, said the bank still did not know exactly what had caused the IT problem. He said it would be addressed by a forensic, open and transparent independent review into what went wrong, which would be shared with regulators, customers and the rest of the industry. He also defended the banking group as a whole, claiming that no priority had been given to UK-based RBS and NatWest over Ulster Bank. Ireland's prime minister, Enda Kenny, criticised the lack of service for customers of Ulster Bank. "It's not acceptable in this day and age that people should have to put up with the fears and the anxieties - and the loss of service - that's been there," he told Galway Bay FM.