BBC article from today"Level 4 paves the way for extra restrictions to be introduced with an announcement expected on Tuesday.
Officials are very aware a fine balance needs to be navigated, which is why a full lockdown is not on the cards.
Downing Street will have to introduce extra restrictions to try to slow down the dramatic resurgence of coronavirus.
You would only have to have dipped into a minute or two of the sober briefing from the government's most senior doctor and scientist on Monday morning to see why.
What is not yet settled however, is exactly what, exactly when, and indeed, exactly where these restrictions will be.
Here's what it is important to know:
The government is not considering a new lockdown across the country right now.
The prime minister is not about to tell everyone to stay at home as he did from the Downing Street desk in March.
Ministers have no intention at all to close schools again.
Nor, right now, are they planning to tell every business, other than the essential, to close again.
What is likely is some kind of extra limits on our huge hospitality sector."
https://www.bbc.com/news/Covid: UK coronavirus alert level moving to 4