If we accept it is perfectly legitimate for Ireland and Norway to have their own approach, and for different states in Germany and the US to do the same, why not within the UK? Is the policy for London the right one for the Western isles too? At the end of the day, we have a system with highly devolved governments and people focus on their own rules. Scottish policy on travel has certainly frustrated me at many points compared to the more liberal English ones, but I don't see why the four nations doing the same thing would have been naturally better or resulted in more trust than say, saying Ireland and the UK should do the same. Given England's size, this would naturally mean England deciding for everyone. At the end of the day, I very much so doubt your average Joe from Edinburgh has any knowledge or interest in the rules south of the border beyond a grumble if pubs opened a week or two sooner, and I would also imagine the average Joe in Bournemouth also doesn't particularly care that we still have to wear masks everywhere here.