Interesting, if long link attached
https://www.ft.com/content/0c7c2597-4afd-4ade-bc19-02c3bbc53daf basically some jobs have been lost, but nowhere as many as was forecast, but jobs added in the city over the period far outweigh the losses. Also the fragmentation of EU finance markets between rivals in Frankfurt, Paris, Dublin etc makes it harder to cluster the skills that are already in London. In short it's going to take a long time for any real change and that will rely on agreement between European countries.
There was also another one getting behind that recent headline about Amsterdam taking over from London as the share trading hub but I completely lost interest because it went in to detail that was way beyond my comprehension. The gist was that the trades were booked in Amsterdam because they're euro trades and the EU regulator requires it, but the economic value of the trades remain in London because the settlement, clearing and risk management remains here.