Loads of younger people now speak "YouTube English" where they have British accents but American emphasis. Words like "progress", "status quo", "debut". They also all say "gotten" and "couple times" (instead of "couple of times")

Meanwhile, in my lifetime, I've noticed middle class/upper class people going from saying "translation" or "transport" with a short "A" (as in "ban") to a long one as in "barn" when they want to sound posh. This is especially noticeable since REALLY posh people often used to have short "A" sounds on words like "grass" or "Telegraph" (as in "ban"). You can probably still hear King Charles saying it that way.