Marks & Spencer has fully reinstated its online operations, bringing back both home-delivery orders and in-store click-and-collect services almost four months after a ransomware attack forced the 141-year-old retailer to shut large parts of its digital platform. The cyber incident, first disclosed on 22 April, prompted M&S to suspend online sales on 25 April and later estimate a hit of about £300 million to operating profit for the current fiscal year. Home-delivery ordering was restored on 10 June, but the higher-margin click-and-collect option remained offline until 11 August. M&S said the relaunch marks a return to normal product availability across fashion, homeware and beauty lines. The announcement lifted the company’s shares roughly 2 percent in early London trading, trimming their year-to-date decline to about 10 percent. Chairman Archie Norman has told lawmakers the attack was likely carried out by the DragonForce hacker group. The UK National Crime Agency arrested four people in July as part of a wider probe into breaches at M&S, Co-op and Harrods. Management expects insurance recoveries and cost controls to halve the net financial impact of the disruption.