This compares with a total of 160 on Saturday, an increase of more than 50 percent, according to the UK Health Security Agency (UKHSA).
Britain registered 43,992 new COVID-19 infections, bringing the total number of coronavirus cases in the country to 10,464,389, according to official figures released on Sunday.
The country also reported a further 54 coronavirus-related deaths. The total number of coronavirus-related deaths in Britain now stands at 145,605. These figures only include the deaths of people who died within 28 days of their first positive test.
The latest data came as British Health Secretary Sajid Javid said all international arrivals to Britain, including children over the age of 12, will need to take a pre-departure test from 0400 GMT on Tuesday. He added that they must be taken a maximum of 48 hours before departure.