Britain fines Carphone Warehouse 400,000 stg over data breach

A man holds his mobile phone as he walks past the headquarters of Carphone Warehouse in west London, May 15, 2014. REUTERS/Toby Melville/Files

LONDON (Reuters) - Britain’s information regulator said on Wednesday it had fined Carphone Warehouse 400,000 pounds ($539,400) after a 2015 cyber attack exposed the personal data of more than 3 million customers.

The Information Commissioner said the fine was one of the biggest it had issued after the electrical goods and mobile phone retailer failed to secure its systems.

The compromised personal data included names, addresses, phone numbers, dates of birth, marital status and, for more than 18,000 customers, their historical payment card details.

($1 = 0.7416 pounds)

Reporting by Kate Holton, Edited by Paul Sandle