PM candidate Leadsom - priority is tariff-free trade with EU

By William James LONDON (Reuters) - Andrea Leadsom, one of three candidates vying to be Britain's next prime minister, said her top priority would be to guarantee tariff-free trade with the European Union after Britons voted to quit the bloc. Speaking as lawmakers in her Conservative Party prepare to choose which two candidates will make the final run-off to replace Prime Minister David Cameron, Leadsom also said that predictions of economic chaos had been disproved. "Trade must be our top prior