NatWest has again apologised to customers after 'technical issues' have left the bank stricken for a third day.
The RBS owned bank has said that they have 'technicians working round the clock,' to get the systems up and running again.
Susan Allen, of RBS, has apologised to customers for the inconvenience the banking technical problems have caused.
Fears have been raised that thousands of customers could be hit with penalty charges if their regular household bill payments such as mortgage payments are affected.
The banking group has promised that no one will be out of pocket and a spokeswoman said that anyone who incurs such a penalty as a result of the problems should contact their branch.
Millions of customers have had problems with their online banking as well as using cards in shops and at ATMs.
Most of the problems appear to have been to do with updating balances, with transfers in and out of accounts - including wages - not appearing.
NatWest has said that they will extend branch opening times to try and help customers:
Over 1000 of our branches will be open until 7pm tonight to help customers with enquiries or who need access to their cash #NatWest
In addition, our branches open on Sat will extend working hours to 6pm, & these branches will also be open this Sun from 9am #NatWest