By Monica Charsley Supermarkets have warned shoppers to only come at a certain time ahead of the first May bank holiday. As some lucky Brits will get to relax on a three-day weekend, retail workers are among other industries who will still have to work. However, some workers will carry out their duties within reduced hours, which means the opening times for some stores will vary. Supermarkets including Aldi, Asda and Tesco, have announced its opening hours to make sure no one turns up to the stores after closing. Some stores state that operating hours have also changed within the branches’ pet…