RoverLord,
The Bonus video I have already seen, I have commented as a 'Rare VHS Uploads' when I watched it. If you check my channel I have videos uploaded of my own two Rover 75's. I recognised the video from your description of the Prince Harry lookalike & relaxing nature of the video with rolling English countryside. 'Andrew Carr' says he is planning to do a full review of that car later in the year.
Something a little different but as a German I think you will appreciate this BBC broadcast from 1996 about the BMW-Rover relationship. Nothing about the Rover 75 is mentioned but it's a sweet little piece that gives an insight into the differing industrial cultures of Germany (Barvaria) & U.K. (Birmingham).
Most of the Germans & British are young apprentices in the video & I found myself wondering what became of them 23yrs later.
Part One BMW-Rover Bonding;
https://youtu.be/Aok3FzBhAYM
Part Two BMW-Rover Bonding;
https://youtu.be/0bzUuhk0K3U
I will examine your other links & see if their are any Rover 75 Reviews that I have missed.
Let me know what you think of that little BBC gem above?
Regards, Matty.