It’s so hard to get any "real" info out about Tannoy production. Very frustrating. You might need to clarify whether 2021 is the target date for purchase or production. And I assume you mean Legacy & Prestige series, since lower lines were already moved off to China much earlier on. Based on no concrete evidence at all, a 2021 purchase of Legacy & Prestige series seems like it would almost certainly be Scotland production. Well, at least as far as that goes - drivers, crossovers, and assembly? Rumor has it the cabinets themselves had been made elsewhere in Europe, since a long time ago.
Kevin Deal / Upscale was claiming continued Scotland production right up to the end when it all came crashing down. But it always smelled a bit funny to me. More likely they ramped up production from the Scotland factory right until its close, and then sold off that stock over time until new production from China was ready to take over. Very nice of them to save loads of money on production and pass exactly ZERO of that to the customer 
We started seeing a few pics here-and-there of DC drivers with boxes stamped from China, a few years ago. Nice stuff, like the Kensington drivers - at the very least, it looked superficially looked legitimate, and appropriately high quality? You can’t really "fake" the alnico magnets, paper cones, cloth hard edge surrounds. That’s something I seriously dislike about the Fyne approach - rubber surrounds, synthetic cones, only ceramic and neodymium magnets?? Ugh. All the wonderful "old world" approach & materials the Japanese fans had pushed for, is gone again.