British disease https://en.wikipedia.org/wiki/The_British_disease
Sick man of Europe https://en.wikipedia.org/wiki/Sick_man_of_Europe
Things then picked up, especially in finance when in 2014: London overtakes New York to be named world's finance capital https://www.standard.co.uk/news/london/london-overtakes-new-...
then Brexit screwed that up. The charges in your link are nothing compared to that lot really.
Headline today: Britain’s debt rising at fastest rate in the world – bar Botswana
I mean you can't really say how it would have gone but tearing up the trade deals with your main trading partners is seldom great for business.