ULSTER Bank has promised to reimburse customers left out of pocket after the latest in a series of technical problems hit salary and other payments.

The bank, owned the Royal Bank of Scotland, said euro customers expecting transfers and wages paid into their accounts overnight were affected by a delay, but the issue has been fixed.

"We apologise for this delay and if any customers have been left out of pocket, we will put this right," the bank said.

Many angry customers claimed they were unable to access current transactions, wages being paid into accounts and other payments.

It is not known how many customers or payments were affected by the glitch.

An estimated 750,000 RBS, NatWest and Ulster Bank customers were affected.