LONDON--(BUSINESS WIRE)--Citi’s Treasury and Trade Solutions (TTS) division today announced that it has been appointed by Shell as its sole bank provider for cash management services across 16 countries in Europe. Citi will provide Shell with a ‘single bank’ solution, providing full end to end visibility as well as control and optimisation of its cash management requirements throughout the region. Citi already has a long-standing cash management relationship with the global energy and petrochem