Heraldo de Madrid - Customer data stolen in Marks & Spencer cyberattack

M&S operations have since Easter been hampered by a ransomware sting which has forced the retailer to suspend online sales, contactless payments instore and even recruiting operations.

"We are writing to customers informing them that due to the sophisticated nature of the incident, some of their personal customer data has been taken," the company said in a statement on Tuesday.

The information stolen could include names, dates of birth, home addresses and telephone number, it said.

M&S added that the data taken did not include "useable payment or card details", nor account passwords.

There is "no evidence" that the data taken has been shared, it said in the statement.

The retailer did not specify how many of its shoppers had been impacted.

It said there is "no need for customers to take any action", but warned them to be wary of emails or text messages that include links to click.

M&S said it has reported the incident to relevant government authorities and law enforcement.

A wave of cyberattacks have hit British retailers in recent weeks, including luxury department store Harrods and the Co-op food chain.

F.Gallego--HdM