1) A containerful of shoddy training shoes are produced in China, shipped to UK, sorted by lowly paid British zero hours workers and put on shelves of High Street sports shop.
2) While this is happening, sterling plunges 25%.
3) Coachload of Chinese tourists visit sports shop attracted by collapsed pound sterling. They exclaim “Wow Western trainers! And so cheap”. They buy them to take back to China as gifts for family members they don’t like that much.
4) Declare a Brexit sales boom!

The expert among you will have noted this economic model is not very sustainable.