Marks & Spencer Chairman Archie Norman revealed that the cyber attack in April was an attempt to 'destroy' the retail giant by hacker group DragonForce.
The attack, involving a 'sophisticated impersonation,' led to online orders being suspended, empty shelves in stores, and is expected to impact profits by around £300 million.
M&S notified authorities and the FBI, expects to recover a substantial part through insurance claims, and has intensified cybersecurity efforts after the breach.
Despite having legacy systems, M&S plans to accelerate technology investments to enhance cybersecurity, and has increased its cybersecurity team and expenditure.