Honestly, I think it was an attack of widespread hysteria, prompted by a primitive disappointment that someone so privileged could die such a needless, accidental death, and that the ongoing soap opera that was Diana (shy Sloane, fairytale princess, peoples friend, human interloper in the royal family, hand-holder of AIDS patients, nice mum, wronged wife, emotionally-incontinent bulimic, confessional interviewee, sassy single lady in fuck-off dresses, tragic pap victim etc etc) was now absolutely over, for good. I think it allowed people who never read newspapers and had zero interest in current affairs to feel part of some notional current of national unity, and it was a story with lots of good guys (the dead saint, the motherless children, Earl Spencer) and villains (paps, drunk drivers, Charles, the RF in general), and when the queen was ‘forced’ to return to Buck House and whichever flag was flying at half mast etc, people who don’t feel as if they have any power felt briefly powerful.
I had just arrived to study in the UK and was fascinated!