It's smoke and mirrors. They're all doing it. If the product is wholly made in China you have to say so but if you do any work at all here you can say it's made in the UK. So buy the cabinets in Poland, everything else in China and put it together in Slough and it's made in the UK. As far as I'm aware you can say made in the UK if you do any work at all, so maybe little more than putting a badge on.chatting to the Tannoy rep he did intimate some were made in UK .
The Tannoy factory in Coatbridge is long closed, I've passed it many times. The building Tannoy UK are in is not a manufacturing site. You can Google street view it and it's clearly nothing more than distribution.
But to be honest, who cares where they are made? Apple stuff is all made in China. Just last week I had to saw the headstock of a cheap Chinese guitar and the quality of the hardwood is as good as anything I've ever seen. My main complaint is that the people making the decisions and designing the speakers are not the passionate individuals of old. They're just pen pushers looking to make as much money as possible off the back of a famous name. Not interested.