Tesco warehouse has suffered a coronavirus outbreak as workers tested positive for the killer disease.The huge distribution centre is the size of 712 tennis courts and a number of workers from the centre are said to be self-isolating at home, Edinburgh Live reports.A Tesco spokesperson said: “The small number of colleagues that have tested positive for Covid-19 at our Livingstone Distribution Centre are self-isolating and their close contacts have been informed."We take the health and safety of our colleagues extremely seriously and are working closely with public health authorities. "We have measures in place to ensure colleagues stay 2m apart throughout our centres and hand-sanitiser, masks, gloves and visors available to all.