Banks face simulated cyber attack to test security
12 November 2013 Last updated at 11:22 GMT
The UK's banks are to be subjected to a simulated cyber attack to see if the system can cope.
The test, called Operation Waking Shark 2, will be conducted by independent consultants and the results will be used to make system improvements.
The exercise will be monitored by the Bank of England, Treasury and Financial Conduct Authority.
Cyber security expert Graham Cluley told BBC Radio 5 live's Wake Up to Money: "They'll be given a number of different scenarios - the story will change during the course of the day - and it will be interesting to see how different teams respond."