There were 106,122 cases reported on Wednesday compared with 90,629 on Tuesday.
The rapid spread of the Omicron variant has driven a surge in cases in the last seven days, with the total rising by 643,219, or 59 per cent, according to government data.
Many industries are struggling with staff shortages as sick workers self-isolate, and hospitals have warned of the risk of an impact on patient safety.
The British government said on Wednesday it was reducing the COVID-19 self-isolation period to seven days from 10 days for people in England who get a negative result on a lateral flow test two days in a row.
Prime Minister Boris Johnson on Tuesday ruled out new restrictions before Christmas, saying that there was uncertainty about the severity of Omicron and hospitalisation rates.
However, he did not rule out further measures after the holiday if the situation deteriorated.
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