A new outbreak of coronavirus has been confirmed at a caravan park in Shropshire.Twenty-one guests have tested positive for Covid-19 at the site in the town of Craven Arms, yet the council fears numbers of cases will continue to rise before infection control measures start to take effect.The 21 people who tested positive were asked to self-isolate for at least seven days from the time they started showing symptoms or from when they received their positive test result.All residents who have come into contact with one of the positive cases have been asked to self-isolate with their households for 14 days.A testing centre has been set up on a nearby business park, and everyone living on the site has been offered a test.The centre will be open.