Don't know, tbh, but if you ask the question 'what are the best ways to ensure the spread of the virus and open us up to potential new strains', keeping airports open is pretty high up the list. I'd have thought by the late Summer, as cases were rising again, the government should have put plans in place to reduce air traffic to an absolute minimum. Essentially, closing the airports, but with whatever level of flights needed to be left in place for emergency travel. Plus testing and quarantine of course. It's astonishing that they are only just getting there now, even allowing for the shitlumps we have in power. There is a genuine balance with this as with any other bit of the pandemic management, but yet again, they've acted too late and killed people as a result.