professor devri sidra, a member of the own scottish government's own advisory group has suggested thatbetween 15—20,000 tests per day. and yet we are still not even meeting the scottish government's own target of 3,500 tests per day. nicola sturgeon said her government is looking at how test, trace, isolate fitted into the next phase of attacking the virus. we will be pushing something next week both to explain how that works and the work we are doing to get to the capacity of delivering it. we are working to have a capacity in place within weeks in order to start to dovetail with how restrictions may start to be eased, but of course the capacity you need will develop over time depending on the degree of social distancing that is still in place. the nhs app to alert people when they may have come into contact with someone who has covid—19 could come out in the next three weeks. it could stop the spread of the disease if people self—isolate when they are told they've been near an infected person. the director of the nhs digital technology arm said the app would be voluntary. the mps in