Unless the government changes tack, the UK's lockdown will have been for nothing

There are no silver bullets, clever models or easy answers for how to control the coronavirus. But neither is it rocket science. Governments have three choices in how they respond. The first and most difficult path is to contain the virus through a programme of mass testing, contact tracing and isolating. This requires a huge effort: building a large infrastructure to monitor cases of the virus and identify hotspots, ensuring this system runs efficiently, providing adequate PPE to everyone who needs it, and deploying border controls to vet who is entering the country.