Tier 3 would 'devastate' London's bars and restaurants: Hospitality bosses issue warning as Tory MPs battle to spare city from 'imminent' move after teenagers were blamed for rise in Covid cases MPs have been warned that people in London should 'expect the worse' in terms of Tier 3 restrictions No 10 to deploy rapid lateral flow tests which give result in half an hour to secondary schools 'immediately' They'll go to schools in seven worst-hit London boroughs, including Havering and Barking and Dagenham Schools in Essex and Kent will be involved in scheme amid concerns youngsters driving epidemics there