It's in the news that the Tesco online shopping site has been down since Saturday and that its due to a cyber security issue. It may be a coincidence, but my Nationwide credit card stopped working this morning and, when I called Nationwide, they said they had been notified of a data breach by a "third party", have stopped the card and will issue me with a new one. I have not yet been contacted by Tesco or any other third party about this breach, so I don't know if there's a connection. Have any other Tesco customers been having credit card problems?