I'm pretty sure it's because you traveled by car -- which means the odds that you were exposing your fellow travelers was limited to the people that would get i

I'm pretty sure it's because you traveled by car -- which means the odds that you were exposing your fellow travelers was limited to the people that would get in a car with you. I've traveled 2 times now by air from NYC -> London during Covid. Last year, a 14 day quarantine on both sides, and on the NYC side, a phone call everyday to make sure I was quarantining. This year on the London side, a 10 day quarantine, 1 negative test before flying, and 2 at home tests while quarantining, with a phone call everyday to confirm. I also got hassled at the airport because I didn't print out the day 2 and 8 receipt, just included the code on my passenger locator form under penalty of perjury. So, the UK by air does care I suspect because of the increased exposure risk.