The measures taken in England appear to be a complete shambles. Boris has consistently failed to take strong enough measures, he has consistently failed to make them easy to understand, has consistently failed to make them enforceable. And as for the Manchester debacle, I am appalled that they have treated public health measures like some sort of commercial negotiation. I can’t see any realistic prospect of Sturgeon being able to close the border but hopefully with the onset of winter the number of holidaymakers from England won’t be such an issue.
We and the people we know in the real world have no difficulty understanding the rules as they apply to us.
In all the online/newspaper quizzes I score 100% - in one yesterday I scored only 7/10 - failing on questions about granny looking after kids (we do no have grandkids), student visiting parents (long past that stage), and large family groups - we do not have an extended family. All the questions about what I can do here and travelling between tiers were correct.
With regard to enforceable, my two daughters in Vancouver report that shops and people in general take more precautions than mandated.
Enforcement should not be an issue.