Lord Rose, who has been Asda’s chairman since months after the £6.8bn takeover, plans to take an increasingly active role while it seeks a full-time chief executive to take charge in the new year.

Lord Rose, who previously headed up Marks & Spencer and Ocado, will assume the day-to-day running at Asda, the company announced on Wednesday. Asda said Mr Issa would remain a co-owner of the ...