this BBC documentary is on royal fashion it’s surely not definitive but is interesting. One of the points made here is that a royal should be concerned with what their clothes communicate but not concerned with what is fashionable. The most fashionable royals were the least popular. Fratelli Prada who is surely the last word on the matter of fashion has said that Queen Elizabeth is the “most elegant woman on the planet”. Yet Elizabeth eschews the “fashionable”. That strikes me as being quite insightful
https://www.youtube.com/watch?v=DZDvS2o5Pdw
Thanks for sending this in! Very good documentary.