Looking at it from a purely UK aviation angle, is it such a big deal? Were all the airlines gambling on 100% load factors next month?
I don’t think any of the companies involved were expecting much in the way of positive happenings before autumn/winter and have been planning accordingly.
There are also the small matters of: a) it hasn’t been officially confirmed yet and b) non-one knows how long it would go on for, if it did go ahead. Not to mention if accurate and quick testing in situ for the virus and antibodies becomes available, then I’m sure we will switch to that as soon as the numbers make sense.