Chinese - basically a glorified copy of the 75, but just happens to use some of the original tooling (based on the long wheelbase version I think). 85% new is enough to qualify, unless it's one of those things where the 85% of bits they've changed have been 70% new grille and 15% new wheels.
And to be fair the Rover 75 was quite heavily German anyway...
British - I'd be quite surprised if more than 15% of this has been changed.
Which are essentially mid-nineties Hondas.
I was reading about the 400 recently. It was actually co-developed, not just a re-styled Honda. Unfortunately, the Honda design team had their own ideas of what they wanted and did it so differently from what Rover wanted that they had no choice but to work with what they had. Rover were pretty cheesed off but they'd invested heavily in it so in the end had to re-style it as best they could and fit it with the best engines they could. Only one Honda unit was used in the car (a 1.6, reserved only for the automatic model) and all the rest were Rover K-series.
The suspension was also tuned completely differently (though not necessarily for the better). The saloon version was all their own work too, even though that shape of Civic was available as a saloon in some markets Rover decided to make their own, and it was all the better for it.
I'm much more comfortable calling the 400 a British car than I would be calling the TF, or even the Roewe 750, a Chinese one. And certainly the MG ZS, as a team of British engineers and stylists (including Peter Stevens) re-worked the 45 heavily for this car.#
But I digress, as I'm going off topic.
MG TF - British, owned by Chinese company
Roewe 570 - Chinese (just)
Rover 400/45/MG ZS - British, co-developed with Japan
Honda Civic - Japanese
