These D2 coilover were once advertised developed and produced in UK. Depends on where and what magazine you read it from.
It actually a product of Taiwan or even China. In some asian countries, they provide 1-2 years warranty, and the shop I went to in HK, they actually will install a new one for me if there’s anything wrong. I passed since my car is in the US.
Unless you had some first person feedback or evaluation, I would still see it as a Taiwan/Chinese product, which is, quality could be good, but you should expect ½ to 1/3 (Price wise) of a comparable products from Japan/Europe/USA…