Boris Johnson is under mounting pressure to impose further travel restrictions to stop the spread of coronavirus after commuters crammed on to public transport yesterday.

The government has said that people who “absolutely cannot work from home” should still travel to their workplaces even if they are not key workers because it is “important to keep the country running”.

On Monday the government issued a graphic on Twitter stating that people could go to work only if they were key workers. It was subsequently amended to say that people could go to work “but work from home where possible”.

The political consensus over the lockdown frayed as Sadiq Khan, the mayor of London, accused the prime minister yesterday of putting economic interests before public