MailOnline has listed all of the major supermarket opening times below so you know when you can make that important trip to the shop. The German-owned budget supermarket chain will be cutting its opening hours on the May Day bank holidayThe German-owned budget supermarket chain will be cutting its opening hours on the May Day bank holiday. However, opening hours differ for shops located inside the M25 with some opening their doors from 7am until 11pm. But the opening times can differ depending on the location with some opening at 9am or 10am. The chain will not be making changes to their stores' opening hours despite it being a bank holiday.