Should the government be prepared to take equity stakes in major companies that will struggle to survive the current crisis? That’s a question already on the table in relation to Jaguar Land Rover and Tata Steel, and likely to arise for British Airways, aero engine maker Rolls-Royce and others. We’re told Chancellor Rishi Sunak is working on a plan, called Project Birch, to bail out ‘viable companies which have exhausted all options’ and whose collapse would ‘disproportionately harm the economy’.