Covid testing: does Operation Moonshot have a shot at success?

UK government is pinning hopes on mass testing but public health directors find flaws in thinking

• 10% of England's population could be tested for Covid-19 every week
• Coronavirus - latest updates

Operation Moonshot, the government's mass testing mission to screen millions of asymptomatic people every week, is having a bumpy lift-off.

The project only emerged because of a leak last month and such was the stated ambition - 100bn to deliver 10m tests a day - that MPs laughed when Matt Hancock talked about it in parliament.