“From this evening I must give the British people a very simple instruction – you must stay at home,” says Mr Johnson, speaking to the UK.
“Because the critical thing we must do is stop the disease spreading between households.”
He says that is why people will only be able to leave home for very limited purposes.
Mr Johnson says it is “vital” to slow the spread of the virus, to “reduce the number of people needing hospital treatment at any one time, so we can protect the NHS’s ability to cope – and save more lives”.
“And that’s why we have been asking people to stay at home during this pandemic,” he says.
“And though huge numbers are complying – and I thank you all – the time has now come for us all to do more.”
BBC