Welcome to the global consumer circus!
What's the UK's biggest export (drum roll) .......... fresh air! Yip, after all those goods from China have been off-loaded, the shipping companies scratch their heads looking around for something to fill them with. There's not a lot available but, there's not much point in those containers returning to China empty, as they're burning the fuel to go back east anyway.
Problem number two; what to do with the increasing amount of recycled paper and cardboard piling up in the UK? Aha! Lets fill up those empty containers. What do the Chinese do with it? They pulp it and turn it into packaging, ready for all those goods that will make their way back to us again. Hmm, seems like a neat cycle. Or is it?