Thanks, Nostradamus. How the fuck have you jumped to that conclusion?
With London out of the EU the financial sector will rapidly migrate to the continent, hollowing out the City.
At the same time manufacturing will be cheaper on the continent as well because of the trade deals, so there goes that.
Take a day trip to the Irish Republic next week, because that's what a country like Great Britain but without a financial sector or a manufacturing base looks like in terms of economic success.