Wales have gone for restrictions to level 2 on 27/12/2021, England will be less restrictive, it always is. So imagine England won't have the extended family bubble rules and more than 5 at resteraunts.
What you must do at alert level 2
At alert level 2 you must:
follow social distancing rules with people you don’t live with or who aren’t in your exclusive extended household
wear a face covering (unless you have a reasonable excuse not to wear a face covering) in all indoor public places
not meet with anyone in a private home other than those you live with or your exclusive extended household
meet no more than 5 other people indoors at a café, restaurant or other open premises (unless with your household of a larger number)
meet no more than 5 other people outdoors or in private gardens (unless with your household of a larger number)
work from home if you can
What can open at alert level 2
schools, colleges and childcare providers
higher education institutions (mix of in-person and remote learning)
licensed premises
retail
close contact services
hospitality
holiday accommodation
entertainment venues
visitor attractions
leisure and fitness facilities, including gyms and swimming pools
museums and Galleries
cinemas
theatres and concert halls
places of worship
community centres
crematoriums
libraries and archive services
sport courts, golf courses
playgrounds and public parks
organised indoor activities (up to 30 people)
organised outdoor activities (up to 50 people)
weddings (ceremony limit set by venue)
wedding reception or wake (30 people indoors, 50 outdoors)
What must be closed at alert level 2
ice skating rinks for public use
nightclubs and adult entertainment venues