BBC : The UK's data privacy watchdog is examining the security of Tesco's website after a string of experts highlighted concerns.
A leading cybersecurity expert says thefts from Tesco Bank's online accounts are unlike anything he has ever seen before.
The attack on Tesco Bank which affected 40,0000 accounts "looks unprecedented in the UK".
Tesco Bank customers will not be able to complete transactions online throughout Monday after a hacking attack.
