The UK has recorded its biggest jump in cases of coronavirus as 273 people have now tested positive for the illness. As of 9am on Sunday, 23,513 people have been tested in the UK. It comes as the Health Secretary is preparing to mobilise an army of up to three million NHS volunteers to help fight the coronavirus outbreak in the UK. Willing volunteers are being called on to give up a few hours to help out in hospitals, nursing homes and community centres.