Given that almost every country in Europe has now announced new lockdowns it does not take a crystal ball to predict that England will also go into a new, stricter lockdown soon.
For context, yesterday Austria announced a total lockdown lasting until 18th January, with a short window on 24th and 25th December when people can mix with a very limited bubble. All hotels, restaurants and cafes are closed until 25th January. There is already a curfew from 8pm. After Christmas only essential shops will be open and during the daytime, people will only be allowed to leave their homes for a few specific reasons. Schools are closed until mid-January. There is a tentative plan to test everyone over the weekend of 16th and 17th January, and anyone refusing to be tested will be required to self-isolate for a week.
Similarly, Denmark closed all shopping centres earlier in the week, and Italy is in almost total lockdown, with people only allowed out for an hour a day.
Meanwhile, Johnson does not want to do anything that might be remotely unpopular, so he dithers, listens to those who tell him what he want to hear rather than those who have insight, refuses to lead and is scared rigid by the idiots like IDS on the right-wing of his party.
The new mutation finally gives him the excuse that he needs to make an unpopular decision. If he had the balls to actually lead and make decisions in the first place, he wouldn't be forever making U-turns and people would be able to make plans with the reasonable assumption that they might actually be able to see them through.