Uh-oh. Looks worse and worse for our family vacation.
While most European countries start to loosen up travel restrictions (taking effect mid-June) the good ole Brits just have to do it vice versa!

So far, Brits allowed foreign people into their country, pandemic be damned, but scanned their temperature and reserved the right to refuse entry when someone seemed to be sick in any way.
Now, when everybody else opens back up, they demand every person coming into UK to strictly quarantine for two weeks. Coming into effect next Monday, June 8th.
At the end of June we have to make a definite decision whether we can travel or not. I doubt the quarantine measures will be lifted until then. That will be the end of our family vacation, sigh.
