UK was involved in (in)famous story of production of K-202. The story that to these days is a highly controversial topic due to various groups blaming different people (from Jacek Karpiński to communist government) for it's failure tho it was pretty impressive and innovative architecture at the moment it was presented to the world, tho prolonged problems with production deleyed it's arrival so much it was no longer able to keep up with western rivals especially integrated CPUs as K-202 was a TTL based architecture.