100% agree with that music being terrifying. One thing that absolutely chills me to my soul even more than any horror film I've ever seen is the Diana death newsflashes.
one with the female continuity announcer is soul destroying. I'm getting goosebumps just thinking about it.
I don't get the dislike of the pre-97 BBC video ident, perfectly pleasant tune and animation. The replacement wasn't as good.
But yep I know the Diana announcement you mean, it is quite unsettling. It's the stiltedness and uncertainty in her voice but also the rustles in the background. A lot of the Diana stuff is a bit chilling, it's the very formal 'regular programming has been suspended' type announcements that are what we long expected to be used for something a lot more frightening