The UK's coronavirus reproduction number - known as R - is between 0.7 and 1.0, according to the latest estimate.
The R refers to the number of people an infected person will pass COVID-19 on to.
An R value between 0.7 and 1.0 means that, on average, every 10 people infected will infect between seven and 10 other people.
The range is slightly narrower than last week's number, which was between 0.7 and 1.1, the Scientific Advisory Group for Emergencies (SAGE) said.
Last week's range was greater compared to the week before that (0.8 and 1) - thought to be down to regional variations in the number.
When the figure is above 1, an outbreak can grow exponentially, but when it is below 1 it means the epidemic is shrinking.