Where as my (and most Londoners I know) opinion of areas in the North is "seems nice"
I’m a northerner in london, been here 20 years. Many, many comments about “thick northerners”, country bumpkins, sheep shaggers, northerners are racist, all voted for brexit and are why we are in this mess. London being the only place you’d want to live as nowhere else has job opportunities, public transport etc.
Have to say many londoners I know have been carrying on as normal. “Bubbles” seem to be interpreted as seeing one family at a time. So someone can see their elderly parents, boyfriend, brothers family etc as long as they see them separately.
One friend’s dc is at uni in one area, christmas with own family in london, and has spent ny with a flatmate and her family in another tier 4 area.
Obviously this is not restricted to londoners, but I think that they have been in such a low tier for so long many are in the mindset that they aren’t a risk to other higher tier areas. That and many have family or second homes elsewhere in the uk, so “staying at home” includes visiting their holiday home, or their parents...