The fact that the U.K. and EU are starting from a position of completely free trade may help the process, said Ian Mitchell, a senior policy fellow at the Center for Global Development in Europe. "The fact we already have tariff-free trade with the EU may make the negotiation easier," he said.
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Britain could set the same tariffs that the EU has in place, including on dairy products, meat, autos and textiles, said Mitchell. Or it could set tariffs at zero to boost trade with international partners, he said.