Originally Posted by clearedforlanding

It's one logic. The problem is it's not the only logical policy you can derive from the all the research that has been done on transmission. And looking at it in terms of cost/benefit I don't see any reason to believe this is the right version of the policy. My simple point would be - the likelihood of a carrier being on a flight is going to vary by location. So vary the policy by starting location. Don't strangle the entire UK aviation sector and all travel with a blunt instrument.