RBS and Natwest have apologised on social media service Twitter for the failure of the giant bank's payment system last night.
Hundreds of thousands of customers couldn't make online purchases, as well as being unable to use physical debit and credit cards.
We are very sorry for the issues that have affected customers tonight.— RBS Help (@RBS_Help) December 2, 2013
Our customers are reporting that services are coming back on line. We will confirm when all systems have returned to normal service.— RBS Help (@RBS_Help) December 2, 2013
If customers have been left out of pocket as a result of these problems, we will put this right.— RBS Help (@RBS_Help) December 2, 2013
This is the third failure of the bank's payments system in the last 18 months, and on the busiest online shopping day of the year - Cyber Monday.