The R number in the UK is estimated to have gone up to between 1.1 and 1.2, according to the SAGE group of government advisers.
© Other The pandemic's growth rate is therefore estimated to be between 1% and 4%.
Last week, the number was put at 0.9-1.0, with a growth rate of -2% to 0% per day.
The R number is the rate at which the infection is passed on, meaning the latest R number shows that 10 people are passing the virus on to another 11 or 12.
Experts from SAGE gave the overall estimate for the UK but their estimates also show a variations across UK regions.
The English regions with the lowest R number, according to the latest data, are the North East and Yorkshire and the North West, where the number is 0.9 to 1.1.
England's regional R numbers are:
- East of England - 1.1 to 1.3
- London - 1.1 to 1.3
- Midlands - 1 to 1.2
- North East and Yorkshire - 0.9 to 1.1
- North West - 0.9 to 1.1
- South East - 1.1 to 1.3
- South West - 0.9 to 1.2