British retailer Marks & Spencer estimated Wednesday that a cyberattack that stopped it from processing online orders and left store shelves empty will cost it about 300 million pounds ($400 million).

UK retailer Marks and Spencer said on Wednesday that it expects a £300mn hit to profits this year because of a cyber attack last month.

Marks & Spencer Group Plc is facing a £300 million ($403 million) hit to operating profit this fiscal year from a cyber attack it suffered a month ago.