Daily modelled estimates produced by the Office for National Statistics (ONS) showed around 9.5% of Londoners had Covid-19 as of Sunday, within a 95% confidence interval of 8.43% to 10.69%.

The figures came a day after Britain recorded a record number of new coronavirus cases as the Omicron variant swept across the country, with the daily tally reaching 119,789 from 106,122 a day earlier.

The ONS report also showed a record one in 35 people in England had Covid-19 between Dec 13 and Dec 19 – compared with a previous estimate published yesterday of one in 45 in the week to Dec 16.

Many industries and transport networks are struggling with staff shortages as sick workers self-isolate, while hospitals in Britain have warned of the risk of an impact on patient safety.

Omicron’s rapid advance has driven a surge in cases in Britain over the last seven days, with the total rising by 678,165, government data showed yesterday.

As the Conservative government of prime minister Boris Johnson struggles to limit the economic impact of the latest Covid-19 outbreak, it said on Wednesday it was reducing the legal self-isolation period in England to seven days from 10.