The Irish government has released some previously classified documents at the turn of the year. There are some that cast light on events in Northern Ireland and Ireland more generally.
The Guardian reports on stories aof acrimonious meetings between David Trimble, leader of the UUP, and Tony Blair, in the period after the signing of the Belfast Agreement in 1997: David Trimble was ‘extraordinarily rude’ to Tony Blair at Good Friday talks
https://www.theguardian.com/uk-news/2023/dec/27/david-trimble-was-extraordinarily-rude-to-tony-blair-at-good-friday-talks
Another headline, “Diana apparently believed Northern Ireland part of the Republic, archive shows” seems to put the worst spin on what may have been a slip of the tongue or a poorly expressed pleasantry. Make up your own mind here.