I read it in the Guardian, of all places.
As I have pointed out numerous times on these forums, the London financial services sector is hugely important to the EU. That means they can't afford to fuck it up to punish Britain and will have to grant it special status in negotiations. It doesn't take a genius to guess where the Tories will focus their negotiation demands.
The talks of Cologne or Paris becoming the new European financial centre are a pipe dream, they won't have the ability to do that for decades, if ever. They simply don't have the maturity of market or infrastructure in place to cope with what London deals with.