People applaud for the National Health Service (NHS) staff from their balcony and window in London, Britain on March 26, 2020. The public has been urged to take part in a mass round of applause on Thursday night to commend the NHS staff and carers for their work amid the coronavirus outbreak. The "clap for our carers" campaign was set to take place at 2000 GMT on Thursday from the country's doorsteps, windows, gardens and balconies. (Xinhua/Han Yan)

Photo taken on March 26, 2020 shows a notice of asking people to stay at home unless necessary near a bus stop in London, Britain. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Xinhua/Han Yan)

Passengers travelling on a tube train observe two metres social distancing in London, Britain on March 26, 2020. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Photo by Ray Tang/Xinhua)

Photo taken on March 26, 2020 shows people walking at Primrose Hill in London, Britain. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Xinhua/Han Yan)

Customers queue outside a supermarket observing two metres social distancing in London, Britain on March 26, 2020. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Photo by Ray Tang/Xinhua)

A woman wearing a face mask walks her dog in London, Britain on March 26, 2020. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Xinhua/Han Yan)

A person wearing a face mask sits outside a closed English pub in London, Britain on March 26, 2020. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Xinhua/Han Yan)

Photo taken on March 26, 2020 shows a notice of asking people to stay at home unless necessary near a bus stop in London, Britain. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Xinhua/Han Yan)

People cuddle each other whilst watching the city skyline on top of Primrose Hill in London, Britain on March 26, 2020. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Xinhua/Han Yan)

People applaud for the National Health Service (NHS) staff from their balconies and windows in London, Britain on March 26, 2020. The public has been urged to take part in a mass round of applause on Thursday night to commend the NHS staff and carers for their work amid the coronavirus outbreak. The "clap for our carers" campaign was set to take place at 2000 GMT on Thursday from the country's doorsteps, windows, gardens and balconies. (Xinhua/Han Yan)

A woman rides her scooter up to Primrose Hill in London, Britain on March 26, 2020. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Xinhua/Han Yan)

People applaud for the National Health Service (NHS) staff from their balconies and windows in London, Britain on March 26, 2020. The public has been urged to take part in a mass round of applause on Thursday night to commend the NHS staff and carers for their work amid the coronavirus outbreak. The "clap for our carers" campaign was set to take place at 2000 GMT on Thursday from the country's doorsteps, windows, gardens and balconies. (Xinhua/Han Yan)

Photo taken on March 26, 2020 shows a notice of asking people to stay at home unless necessary near a bus stop in London, Britain. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Xinhua/Han Yan)

People take a rest on top of Primrose Hill in London, Britain on March 26, 2020. The British government said on Thursday that the number of confirmed COVID-19 cases in the country has risen to 11,658 as single-day deaths topped 100 for the first time since the outbreak of the disease. (Xinhua/Han Yan)