UK reported 32,725 new infections after recording the highest number of cases to date.
A further 570 people have reportedly died within 28 days of testing for coronavirus in England on Christmas Day, government figures show.
Divided nations will not publish details of deaths today due to the holidays, so this is not included in the statistics.
However, they continue to publish information on cases – with 32,725 confirmed new cases recorded in the UK.
On the eve of Christmas, the UK recorded the highest number of cases every day up to 39,237.
The number of tests increased last week from about 400,000 a day to 500,000 a day, so this will count on an increase in cases – but not all.
The seven-day rate of COVID-19 cases per 100,000 people is the highest since the epidemic began, however it is also important to note that mass testing was not available at the start of the peak period in April and May.
In the week ending December 20, there were 344 cases of coronavirus per 100,000 people.
The greatest increase in cases is driven by the Southeast and East England, where new and more invasive viruses have developed.
Fear of this new type means that millions have not been able to visit loved ones at Christmas as those living in Tier 4 areas are not allowed to meet other households.
Boris Johnson was forced to set up an ax to allow for a five-day release of restrictions during the holidays and move some areas to a higher level of action as the impact of rapidly spreading differences became apparent.
Most venues are set to Tier 4 one minute at midnight on Boxing Day, while Scotland and Northern Ireland will set new challenges on the same day.
Wales are also under severe restrictions and made it easier for them only for Christmas.