Government sources say that between 12 million and 15 million people have been identified as likely to require hospital treatment if they contract coronavirus, or be at risk of dying from it. Once this group has received the vaccine – which some officials hope could be achieved by the end of February – then the NHS would no longer be at risk of being overwhelmed if the virus spread through the greater population. That would remove the main argument for shutting the economy at a stroke.

A source said: ‚The path to liberation is finally becoming clear.‘