By Amber Murray Supermarket giant Asda has announced that Mohsin Issa will step away from his executive leadership role to focus on his position as sole chief executive of petrol forecourts business, EG Group. Lord Stuart Rose will assume Mohsin’s responsibilities alongside TDR Capital partner Rob Hattrell, the Leeds-headquartered grocer said, while Mohsin Issa will remain a co-owner of Asda and non-executive on the board. Asda will continue its three-year search for a chief executive “to lead the business in the next phase of its strategy” and said it will update the market “in due course”. L…