LONDON – A huge row has broken out in the U.K. about the accuracy and utility of COVID-19 lateral flow tests (LFT) in screening asymptomatic people, as a pilot field study indicated sensitivity is less than 40%, and a nationwide roll out already is in train. At present 116 areas of the country are due to implement community testing from next month, health care workers are due to be handed personal LFT supplies to test themselves twice a week, and the government is about to mandate use of the tests in schools after Christmas.