Just checking so I don't mess things up:
If my mother is to enter the UK on 17 October - what date does she need to land in another country to make sure that she is out of a red country for 10 'UK days' for counting purposes?
It is an overnight flight from her red listed country to a green listed country. Can she land there on 07 October, leaving the red country on 06 October? Or does it need to be one day before?