The Prime Minister, Boris Johnson, will self-isolate for seven days in his flat No 11 Downing Street after he tested positive for coronavirus. Johnson, 55, developed mild symptoms – a temperature and persistent cough – over the last 24 hours. He will continue to work from home and lead the national response to the pandemic. Testing is to be extended to frontline NHS workers, with hundreds to be carried out this weekend, Michael Gove announced. This will be antigen testing – testing whether people currently have the disease – and will be increased “dramatically” next week. Testing criteria is based on show symptoms and the centrality of one’s role to the coronavirus crisis. Two further NHS Nightingale hospitals will be built in Birmingham and Manchester. NHS England has also reconfigured hospital services so that 33,000 hospital beds are available to treat further patients. The health secretary, Matt Hancock, also tested positive for coronavirus after having mild symptoms. He will self-isolate until next Thursday. England’s chief medical officer, Prof Chris Whitty, is self-isolating after experiencing symptoms compatible with Covid-19. He will continue to advise the government’s medical response to coronavirus, supported by his deputies. The UK death toll rose by 181 to 759, the highest day-on-day increase so far, and the rate of infection has been doubling every three to four days. Michael Gove announced that 113,777 people have now been tested for Covid-19; of those 14,543 have tested positive, an increase in the last day of 2,885. There were 168 more deaths in England, a further three in Northern Ireland, six more recorded in Wales, and a further eight in Scotland. A temporary mortuary is to be opened at Birmingham Airport in preparation for a predicted rise in the number of fatalities from coronavirus in the region. Work has begun on the site, which will initially be able to hold 1,500 bodies, although it will be expanded to hold more. That’s it for today from the UK side. For more coronavirus updates, head over to our global coronavirus live blog for the latest worldwide coverage.