I don't suppose it's well known, but Lady Diana remained a director of Konchok Foundation until the end of her life. Since I'm also involved with Konchok Foundation, it was in that capacity that I had periodic contact with her over the past twenty or so years. She continued to have a strong interest in developments at Surmang, and, of course, had never forgotten her own visit there with her family.
From their side, the Surmang leadership were quite well aware of her importance to the continuation of the dharma legacy of Chogyam Trungpa Rinpoche, who continues to be regarded as a monumental figure in Tibet.
Lady Diana was always interested in receiving updates about Surmang. I would have sent them to her regardless, there was no need for her to thank me. But she did occasionally send me thank you notes, unfailingly gracious in tone. Certainly beyond anything I had done to deserve them. I came away feeling that she didn't regard generosity of spirit as something that one had to conserve else you might run out.