England will be closing its borders with Wales and Scotland to anyone who is not a citizen, Prime Minister Boris Johnson has announced.
The new measure, to mitigate the spread of the coronavirus in England, also includes the Isle of Wight, The Channel Islands, and the Isle of Man.
Additionally, train operators will be "formally mandated' to prevent symptomatic travelers from boarding trains to England, Mr. Johnson said on Monday.
Only four English train stations - in London, Birmingham, Manchester, and Bristol - will be accepting trains from Wales and Scotland; however, only English citizens will be allowed to board.
"As the virus continues its spread, we've decided to take increasingly aggressive steps to keep English families safe," Mr. Johnson said.
Mr. Johnson said these "far-reaching" measures will help save English lives.
What is the situation in England?
England had at least 324 confirmed cases of Covid-19 across all counties, as of Monday morning. There are an additional 17 presumptive cases.
Three new deaths linked to the virus were reported, bringing the total fatalities in England to four.
Last week, England asked citizens to avoid all non-essential travel and urged Scots, Welsh and Irish to return home.
The new measures on travel to England will be in place as of Wednesday, 18 March, officials said.
"If you're out of England, it's time for you to come home," the prime minister said, "and, if you're a Jock, Taffy or Paddy, please leave our green and pleasant land, and return to your own country. The NHS is for the English and, to be honest, you're always moaning you hate us anyway."