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As negotiations begin Dan Damon speaks to two people with experience of cutting a deal with the European Union. Yanis Varoufakis was the Greek Finance Minister in 2015 and had to negotiate with the EU during the country's government-debt crisis. Jason Langrish is the Executive Director of the Canada Europe Roundtable for Business. He was involved in negotiations on the EU-Canada Comprehensive Economic and Trade Agreement (CETA).

(Picture: European Parliament. Credit: Getty Images)