The increase brings to an end a steady fall in UK-wide infections since early July, when the total hit 3.8 million at the peak of the wave caused by the Omicron BA.4 and BA.5 subvariants of the virus.
COVID cases in England and Wales have risen for the first time in two months - marking an end to a steady fall since early July.
The increase means the total number of infections in the UK has also gone up, but levels are estimated to have fallen in Scotland and Northern Ireland. About 927,900 people in private households across the country are likely to have tested positive for coronavirus in the week ending 14 September, according to the Office for National Statistics .Infections across the UK had been steadily falling since early July, when the total hit 3.8 million at the peak of the wave caused by the Omicron BA.4 and BA.5 subvariants of the virus.