Carphone Warehouse hackers may have accessed 2.4m customers' data

Initial investigation suggests customers' names, addresses, dates of birth and bank details may have been accessed

The personal data, including bank details, of millions of Carphone Warehouse customers may have been accessed in a "sophisticated cyber-attack", the retailer has admitted.

The high street firm is investigating how hackers breached the IT systems of one of its UK divisions last week, an attack that also affected TalkTalk mobile customers.