I'd love to have an answer to that question, but I dont have one. Seems to me that everything is a bit trial and error, suck it and see. But if we don't take calculated risks then the economy and so society will collapse with inactivity. As noted elsewhere people are becoming furlough addicts - and why not take 80% for doing nothing and staying in your little bubble.

This is what I said a couple of months ago - the key is managing unlockdown as that involves risk. Let's hope that risk has been adequately assessed, although I suspect you think it hasn't been.

I have a little more faith / hope / optimism but equally I can see how transmission rates might respike.

The point is we have to do something, we cannot just sit here and watch society walk off the cliff. Returning to work will be central to stopping the cliff being too high. If only women had not been integrated into the workplace, they could stay at home and let the menfolk work 😉😉