As always, economics comes into play. It always has, that's why so many industrial towns had to reinvent themselves and now do well in terms of business parks and science parks.
Many towns relied on the factories and a manufacturing industry. When they are no longer financially viable - for all sorts of reasons, we (and other countries) pick up the slack from elsewhere, at a better price.
It remains to be seen if Turkish investment will save the steelworks in Sunderland. I hope they do well, but the world is changing and getting value for money in terms of goods and services is the name of the game - world-wide.
This has little to do with Brexit, more to do with overseas investment. It's good that we attract investors when the pessimistic Remainers would have us believe the UK is a lost cause.