Core banking activities such as deposit-taking, investment services to retail clients and syndicated and other cross-border lending services. If U.K.-based banks want to continue those lines of business, they’ll most likely need to do so from offices in the EU — hence the recent shift of some operations to Frankfurt, Paris, Dublin and other cities. Banks are now moving more executives and banking business, with JPMorgan Chase & Co. planning to transfer 200 billion euros in assets to Frankfurt.