UK should not give formal notice on EU membership until position clear: lawmaker

"The UK's negotiating position has yet to be established. Article 50 should not be triggered until it has been," Treasury Committee chairman Andrew Tyrie said, referring to the clause which starts the clock on two years of talks to leave the EU.

"A crucial task is to identify the maximum level of EU market access, consistent with the need for some control on migration," he added in a statement on behalf of the committee.

(Reporting by David Milliken and Ana Nicolaci da Costa)