Testing in place of self isolation is much better for the majority though, surely? Test on x days during the isolation period, perhaps they could use a model similar to the green travel one.
Or perhaps move to the whole country only testing for symptoms or of a household contact/very close contact has covid?
Tbh once it's autumn term all adults will have been offered both vaccines so maybe we need to move to this approach for all, including for travel unless it's deemed a country with a very high rate (and have that rate actually written down so we know, rather than it appearing to be arbitrary) I know the vaccine isn't perfect for all CEV, but there will need to come a time when we move forward, and once the majority are double vaccinated and all adults have been offered it then maybe it's time to find the next way of managing it.