The UK reproductive number has dropped slightly to a maximum of 1.1 from a maximum of 1.2, according to new figures.
The figure has been confirmed by the Scientific Advisory Group for Emergencies (SAGE), which advises government on its response to the pandemic.
Scientists have estimated that the reproductive number, called R, is now between 1.0 and 1.1.
R represents the average number of people each COVID-19 positive person goes on to infect.
This means that on average every 10 people with coronavirus will infect between 10 and 11 others.
The reproduction number was between 1.0 and 1.2 last week.
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The R number is one of the many indicators that scientists use to determine how fast COVID-19 is spreading.
Analysis of R numbers across England
England: 1.0 – 1.1
East of England: 1.0 – 1.3
London: 1.0 – 1.2
Midlands: 1.0 – 1.2
North East and Yorkshire: 1.0 – 1.1
North West: 0.8 – 1.0
South East: 1.1 – 1.3
South West: 1.0 – 1.3
When the figure is higher than 1, a case can grow exponentially.
The growth rate, which estimates how fast the number of infections is changing day by day, is between 0% and 2% in the UK as a whole.
It means that the number of new infections is growing 0% to 2% every day.
Estimates for R and growth rates are shown as a range, and the true values are likely to fall within this range, according to the experts.
SAGE also said that the figures released on Friday represent the average position over recent weeks rather than the current position.
The latest R number and growth rate were revealed as the health secretary told Sky News he hoped mass vaccination program starts “within a few weeks”.
The Office for National Statistics has said that the number of coronavirus infections in England appears to be “leveling off“in recent weeks.