GCHQ cybersecurity experts investigate Dixons Carphone data breach

Electronics retailer apologises for breach involving 5.9m customers’ bank card detailsA branch of GCHQ, Britain’s intelligence and security service, is investigating one of the UK’s biggest data breaches at a single firm, involving unauthorised access to 5.9 million Dixons Carphone customers’ cards.The National Cyber Security Centre said it was working alongside the retailer and other agencies after the attack, which also involved unauthorised access to 1.2m personal reco