A man plays guitar by the River Thames with the Tower Bridge in the background in London, Britain, on Aug. 13, 2021. Another 32,700 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 6,211,868, according to official figures released Friday. (Xinhua/Han Yan)

People dine in the outdoor dining area of a restaurant in London, Britain, on Aug. 13, 2021. Another 32,700 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 6,211,868, according to official figures released Friday. (Xinhua/Han Yan)

The city view is pictured in London, Britain, on Aug. 13, 2021. Another 32,700 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 6,211,868, according to official figures released Friday. (Xinhua/Han Yan)

A waiter is seen at a restaurant in London, Britain, on Aug. 13, 2021. Another 32,700 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 6,211,868, according to official figures released Friday. (Xinhua/Han Yan)

People walk near the Tower Bridge in London, Britain, on Aug. 13, 2021. Another 32,700 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 6,211,868, according to official figures released Friday. (Xinhua/Han Yan)

A man buys flowers from a florist in London, Britain, on Aug. 13, 2021. Another 32,700 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 6,211,868, according to official figures released Friday. (Xinhua/Han Yan)

People walk past the Tower Bridge in London, Britain, on Aug. 13, 2021. Another 32,700 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 6,211,868, according to official figures released Friday. (Xinhua/Han Yan)

Children play with water in a fountain near Tower of London in London, Britain, on Aug. 13, 2021. Another 32,700 people in Britain have tested positive for COVID-19, bringing the total number of coronavirus cases in the country to 6,211,868, according to official figures released Friday. (Xinhua/Han Yan)