I can answer some of this for you. 🙂
I have a black inspiration, and on delivery it didn't have the "Inspiration" style build plate like some others I have seen online - instead it has a "Bespoke Build" plate instead.
After some back and forth via the dealer we were able to ascertain that UK cars won't have an individual numbered plate, but the following are true as of last week:
So far 3 black inspirations have been ordered in the UK. (I know of two, my V8 and a hybrid that Lexus Coventry have as a demo car/on eBay... so third is either still in build, or delivered and off the radar)
They expect the total number in the UK to be between 13-15.
Black Inspiration builds will end in March 2023.
Lexus UK were able to confirm the build date on mine, and that I have "No.1" for the UK - first time I've been number 1 for anything! 😁
The wheels, paint, dark chrome and spoiler are stunning in the flesh, (and the spoiler is ever-present in the wing mirrors!) the paint appears deep black to heavily flaked graphite depending on how the light hits it. 🥰
I've got a thread on elsewhere about it, but here's some pics: