Marks & Spencer will shed light on its recovery after a major cyber-attack last year that dented sales growth and weighed on profitability. The retailer will update shareholders on Wednesday May 20 on its recent progress and how consumers are faring amid a backdrop of global concerns about inflationary pressures. The results update comes just over a year since it was targeted by hackers. M&S was forced to stop all online sales for about six weeks, and it had empty shelves because of disruption to its logistics systems, after it was hit around the Easter weekend. The London-listed firm said late last year that the incident would hit its annual profits by about £136 million, predicting that about £34 million of this would come in the final six months of its financial year. It previously indicated it hoped operations in its fashion, home and beauty business would return to normal by March.…