This is up from 0.9 to 1.1 last week, and scientists have said the UK could now be at risk of rapid infection growth as the R number is now above one.
In a report, the Government said the UK R rate number is now somewhere between 1.0 and 1.2 as cases of coronavirus continue to rise across the country.
The Government Office for Science said the UK R number is now somewhere between 1.0 and 1.2 and the UK could now be at risk of rapid growth
Current figures are driven by local outbreaks, not a national average, the government has said, and scientists said estimates may be less reliable when overall presence of the virus is low.
The UK’s coronavirus R rate has risen and may be above 1, the Government Office for Science confirmed on Friday.
The daily growth rate for the UK as a whole has been between -1% and 3%, up from -1% and 2%.
The R number represents the average number of people that one infected person will pass the virus on to.
The Prime Minister said the new set of lockdown measures aimed at combatting the spread of the virus and preventing a devastating second wave this winter.
It comes as Boris Johnson announced plans to tighten restrictions on social gatherings, with Brits now limited to events of 6 people or less.
Some areas of life will remain unchanged, including work, education and sport, but socialising with family and friends will take a hit.
There will be certain key exceptions where meeting in groups larger than six is allowed.
Everyone lives together or is in the same support bubble, or for work and voluntary services, as well as childcare and education, will be unaffected.
Organised indoor and outdoor sports, physical activity and exercise classes are also allowed, meaning gyms should stay open.
Weddings, civil partnerships, baptisms, funerals, and other religious life-cycle ceremonies will still be able to go ahead, with up to 30 people able to attend.