NatWest customers rushed to Twitter and other sites on Monday evening to report their debit and credit cards were being decined in shops across Britain. Other said they couldn't use the bank's website or smartphone apps, either.
http://www.telegraph.co.uk/finance/...t-in-technology-meltdown-on-Cyber-Monday.html
Just gone to log into my online banking to make a transfer and wondered how it could be offline at 8pm. I know they sometimes have maintenance but its a little early in the evening.
Surprising a bank can cease to function under load.