It was reported everywhere like a Fox News Republican Convention, maximum salivation.
I don't know what Sky News's coverage was like in early February - I'd be very interested to see any links you have saved - but you highlight a huge part of the problem. By the time covid came along we'd already been subjected to 4 years plus of brexit bullshit and trump bullshit. There were already very high levels of public mistrust in anything politicians or the media said, especially if it appeared overblown or sensationalised.
In times of trouble people turn to the BBC and in early February they were just telling us to wash our hands and use a hanky.
People would have dealt with stopped flights as we dealt with lockdown 6 weeks later = acceptance.
No they wouldn't.
At February half term we had 9 confirmed cases and no deaths. By 23 March, when the first lockdown started, we had had over 6000 cases and 331 deaths. Even then, loads of people did not greet lockdown with 'acceptance'.
A law to stop flights just would not have passed in early February regardless of how wise a decision it looks to us now, almost a year later, and regardless of how wise a decision it looked then, to a tiny few people. February 2020 was the olden days before the Coronavirus Act. The government could not have just bunged out a statutory instrument and expected the public to 'accept' it. They'd have had to submit a proper bill to be debated, amended and voted on in each house. Such a bill would have fallen at the first vote because 9 cases and no deaths.