The Latest: DC chief urges quick UK action on Brexit

BRUSSELS (AP) — The Latest on Britain’s vote to leave the European Union (all times local)

10:45 a.m.

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The EU Commission chief says he is banning any informal and secretive negotiations on a British exit until the nation formally notifies it wants to leave the European Union in the wake of last week’s referendum vote.

Jean-Claude Juncker told a special session of parliament that “I want the UK to clarify its position, not today, not tomorrow at 9 am, but soon. We cannot allow ourselves to remain in a prolonged period of uncertainty.”

Britain has indicated it might not officially notify for several months, perhaps until October, leaving the 27 other nations in political limbo. Yet Juncker refuses to start talks with London before that.

He said there will be no secret meetings between UK, national governments and commissioners in the corridors. “I ban that,” Juncker said.

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10:30 a.m.

The Dutch presidency of the European Union is mounting pressure on Britain to make haste with its withdrawal from the bloc after last week’s referendum.

Dutch Minister Jeanine Hennis-Plasschaert told a special session of the EU parliament that “No one, no one, will benefit from a period of prolonged limbo. The ball is in London’s court,” she said.

She said that “cool heads must now prevail” to chart the way ahead. Britain has said it might not officially start the talks to withdraw for months now. Hennis-Plasschaert acknowledged that the UK needs time, given the political chaos in the country. Yet she wants to make the transition as short as possible.

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10:15 a.m.

Prime Minister David Cameron will be meeting European Union leaders in the first session since the U.K. voted to leave the 28-nation bloc.

Cameron will discuss the implications Tuesday of the Brexit vote as markets gyrated. He has insisted the vote won’t send the economy into a tailspin, even as the country was stripped of its top credit rating and stock markets.

Calling the vote a “seminal event” that “will lead to a less predictable, stable and effective policy framework” Standard & Poor’s knocked the U.K.’s sovereign rating by two notches on Monday, from AAA to AA. Hours later, Fitch Ratings followed suit.

The impact of the vote is shaking this nation of 64 million. Cameron has announced his resignation and challengers are lining up to replace him