UK's financial services sector makes more that the entire manufacturing industry added together.
That is included in the trade balance. One of the links briefly mentions what happened to the UK's USA interests. The GBP was once a powerful currency. Now bizarrely it's the USD. Merkel threatened to open a EU trading system. In some respects given trade that makes more sense - who would dare though.
Fact though - nothing works well really what ever has been tried and WWII screwed things up even more. The rich always get richer and profit is the god. It's also the god of communist states now.
In many ways UK tech lead the world for some time but can't afford it any more.