The government put itself at loggerheads with Transport for London today after the Health Secretary said more trains should be running on London Underground.
Speaking at Downing Street's daily press conference Matt Hancock said Tube bosses should have services "running in full".
He said it would help ensure passengers were further apart which would help maintain social distancing guidelines.
Pictures posted on Tuesday morning on social media showed people packed into busy carriages.
Nurse Julia Harris, who commutes to work at Imperial College NHS Trust, said she had left earlier and changed her route to avoid crowds but still found the District Line to be busy.
Julia said the reduction in Transport for London services meant "you now have more people waiting and piling onto the tubes and trains".
Mayor of London Sadiq Khan said an increasing number of Transport for London staff were sick or self-isolating.