European Union negotiator Michel Barnier said Britain must accept all EU laws during a post-Brexit transition period, including those made after it leaves. <br/>'<br/>The French former minister and European commissioner was speaking at a news conference in Brussels today after ministers backed the EU's negotiating stance on the issue. <br/>'<br/>Barnier's comments came after his British counterpart David Davis said today that there would be "argument" with the EU about whether Britain could object to new laws.<br/><br/>The EU negotiator also stressed that Britain would have no decision-making power in the EU during the transition, which the bloc wants to run from March 29, 2019, when Britain leaves, until the end of 2020.<br/>'<br/>''''''<br/>