I have a feeling that the most the government will do is go back to the "rule of six" for indoor hospitality, and pointlessly introduce more mask wearing in those places where it is not mandatory. (eg pubs and swimming pools)
Making pubs outdoors only for two, or even four, weeks isn't going to have much of an impact on reducing transmission, especially as January is usually a quiet month for pubs anyway.
I think we may even get away with "strengthened guidance", such as voluntarily limiting the number of people you mix with or going to pubs and hospitality venues at times of the day and days of the week when they are quiet.
This would seem more proportionate to the challenge faced by the health service.
I doubt that SAGE and their ilk would be satisfied though.