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The Prime Minister Jacinda Ardern and the Foreign Minister Winston Peters have been talking up the possibility of a Commonwealth trade agreement. The pair are arriving back in the country after a succesful week in Europe as part of the Commonwealth Heads of Government Meeting. While there, Ms Ardern met with Emmanuel Macron, Teresa May and Angela Merkel, with trade front of mind with both the European Union and the UK in a post-Brexit world. Trade expert Charles Finny tells Guyon Espiner: "These things, if you give them time, may lead to exciting outcomes."