(unsure if) our daughter and her estonian partner will ever be able to live in the uk... it may not seem that important to concern yourselves on the human rights of a few million displaced or uncertain citizens but....well, it matters to me.

Very well said. People have to be at the centre of this. Trade deals and tariffs only matter for the effects they have on people.

I am aware of the opposite situation. My sister and her husband have felt obliged to sell the house they have lived in in Germany for some 15 years and where they had intended to live for the rest of their lives, to move back to the UK because of the uncertainty over the health care rules. it MIGHT gave all been ok, but there is still no guarantee. I could have been in a similar position to you with my Italian daughter in law, but she took UK citizenship a decade or so ago.

These things matter.