KARFA

So I am not really convinced you are allowed to leave Scotland for the purposes of driving to LHR to pick her up. I would suggest that strictly this isn’t allowed for you.

In terms of requirements for her, either flying up from LHR or getting the train should be fine. She will have to present her pre arrival test and PLF on arrival at LHR of course. I think flying would probably be better since it’s much quicker and doesn’t require her to cross London to the train station. She can do her self isolation at home with you.