Government data released on Friday showed the daily growth rate of infections in the country was estimated to be between 3% and 6%, down from 0% to 3% the week before.
An R-value between 1.2 and 1.4 means that on average, every 10 people infected with the coronavirus will infect between 12 and 14 other people.
The latest figures come amid growing concern over plans to lift Covid restrictions on June 21, with cases rising sharply in parts of the UK due to the arrival of the Delta variant (formerly known as Indian variant name).
Public Health England (PHE) warned on Friday that data suggested cases of the Delta variant would double every four and a half days in parts of England.
The agency said 42,323 cases of the variant had been confirmed in the UK on Friday, up 29,892 from last week.
PHE also said more than 90% of new cases of Covid-19 are now the Delta variant, with new research suggesting it was associated with an increased risk of home transmission of around 60% compared to the Alpha variant previously. dominant.
Boris Johnson is expected to announce next week whether the next step in the government’s roadmap to come out of the lockdown will unfold, with discussions of a possible delay of at least two weeks for the lifting of restrictions.
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