The UK on Thursday recorded 6,634 new coronavirus cases, making it the highest daily figure since mass testing began.
Another 40 people have died within 28 days of testing positive for the virus.
The latest figures take the overall number of confirmed cases to 416,363, and total deaths to 41,902.
Meanwhile, people arriving in the UK from Denmark, Slovakia, Iceland and Curacao will need to self-isolate for 14 days from Saturday.
After falling from their April peak, confirmed new coronavirus cases in the UK have been rising again since July.