Natwest: 'Situation clearly unacceptable'
Thousands of NatWest accounts are still affected by computer problems, leading the bank to take the unusual step of opening on Sunday for customers.
While the underlying computer failure is reportedly resolved, the bank is still dealing with a massive backlog.
Some RBS and Ulster Bank accounts have also been affected, but NatWest says no one will be left out of pocket.
Susan Allen, from the retail banking arm of RBS, apologised to customers.