There have been warnings coronavirus may be starting to spread again in the north-west and the south-west of England.
Some scientists say the R number is creeping up across the country and may have surpassed one – the point at which the epidemic takes off again – in these regions.
Tameside Council has “strongly” advised schools not to reopen on Monday.
The government insists the number is not above one anywhere in the country.
So, what is going on? How worried should we be? And what does it mean for lifting lockdown?
Quickly, what is the R number again?
It is the number of people each infected person, on average, passes the virus onto.
If the R is three, then 10 people would infect 30 others. But if R is