The UK government has advised against all non-essential travel and instructed that people remain at home.
Public transport must only be used for essential journeys. If you need to make an essential journey, it is advised that you walk or cycle where possible.
Events have been cancelled, and attractions, restaurants, pubs, theatres, public spaces and other venues have temporarily closed.
A nationwide ban has also been placed on public gatherings of more than two people.
Check the latest UK government information and travel advice for London.