Brexit: A Warning to London

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Goldman Sachs boss Lloyd Blankfein tells the BBC his bank is already contingency planning to relocate staff depending on the terms of the UK's exit deal with the European Union. Presenter Manuela Saragosa asks the BBC's Economics Editor Kamal Ahmed what this means for the efficiency of Europe's financial markets. Plus, with the rise and rise of digital marketing, do we even realise when we are being targeted by adverts? Manuela speaks to Bill Fisher of marketing research company eMarketer, as well as to blogger and "influence marketer" Janice Croze. (Picture: London skyline; Credit: Dan Kitwood/Getty Images)