The simple tactics of hackers targeting major firms like M&S and Co-op

Cyber attacks are being attempted ‘all the time’ (Picture: Getty / PA)

Companies and websites are facing ‘constant’ cyber attacks after a number of supermarkets were targeted by hackers, an expert has said.

Hacks like the one that paralysed Marks and Spencer payment systems and led to customer data being stolen are being attempted ‘all the time and everywhere’, cyber security expert Dr Ian Batten told Metro.

M&S shoppers were greeted with empty shelves after the ransomware...