It's not going to end any time soon, they are still reporting cases. I think it will probably be in place all year. If lockdown is compromising the welfare of your flock you need to think about changing the situation somehow ......
I think it's a risk assessments situation.
How much risk is there to the captive birds from wild birds, as opposed to risk of them being in much restricted captivity.
We have very few migratory birds here, geese if any fly extremely high. Only a few pigeons and crows and my dogs make them shift almost as they land. Other than that just sparrows, robins, blue tits which eat bird seed on my balcony and fly off to the bushes at the bottom of the orchard
My four Wyandottes have plenty space really, and show no signs of stress from being captive, but the hard packed earth is going to cause them feet problems if I don't do something about it soon. And I have to throw in greenery to supplement their pellets and corn. I've found a source of dried fruit and flowers which they seem to like too, and it smells lovely.
So I'm considering letting them out on grass under supervision into an adjacent fenced area, for a short period each day, the main problem being getting them back in again 🙄