File photo dated 27/5/1993 of Queen Elizabeth II with President of Ireland Mary Robinson at Buckingham Palace. Diana, Princess of Wales showed "obvious ignorance of, or disregard for, constitutional niceties" in relation to Northern Ireland, according to a note from the Irish ambassador in 1993. The late princess had referred to Northern Ireland as part of Ireland in an interaction which was noted ahead of a historic visit by then-Irish president Mary Robinson to Buckingham Palace. Issue date: Wednesday December 27, 2023.