@frickerforfair@BorisJohnson The rules are there to be followed, even if you disagree with them. Instead of spending time trying to find ways to circumvent the law / guidelines how about adhering to them so everyone benefits?
@frickerforfair@BorisJohnson If it's the same household living together, any number of people would be ok. No one is expecting you to evict a family member. In your example the returning person would need to wait away from the house until "granny" had finished her Sunday roast and left.