Urging to stay at home, the UK government is sending letters to 1.5 million people who are considered at risk of coronavirus.
UK government said that those most at risk will receive letters or text messages strongly advising them not to go out for 12 weeks to protect themselves.
UK Prime Minister Boris Johnson also asked the countrymen not to visit loved ones on Mother's Day, and follow social distancing guidelines. He has called on the public to join a "collective national effort”.
Mayor of London Sadiq Khan asked people to heed the advice, saying "do it for loved ones who will die if you don't".
The number of people who have died in the UK with coronavirus rose to 244 on Sunday, as cases topped 5,000.