BRUSSELS: British Prime Minister Theresa May sought to brush off a humiliating parliamentary defeat as she arrived at a Brussels summit on Thursday, insisting Brexit was on track as EU leaders prepared to move talks onto the next stage.

May said she was “disappointed” that members of her Conservative party had rebelled late on Wednesday to demand parliament has the final say on the separation, but stressed: “We’re on course to deliver Brexit.”

The other 27 EU leaders are expected to use the two-day summit to endorse a deal struck last week on the key Brexit separation issues after months of torturous negotiations.

Several leaders sought to play down the impact of the vote in the House of Commons, although Luxe­m­­­bourg Prime Minister Xavier Bettel warned: “It’s not making her life easier.” May has struggled to assert her authority since losing her parliamentary majority in a June vote, and the latest setback will renew fears about her mandate for negotiations on the second phase.

Pro-European MPs declared they had taken back control of Brexit after amending a landmark piece of legislation to ensure that they must approve the final divorce deal.

Dutch Prime Minister Mark Rutte said May still had a “formidable stature”, saying the agreement on the divorce deal “showed you should not underestimate her”.

However, with British ministers only due to discuss the post-Brexit future next week, he warned that “we need from her to understand how she sees the future relationship”. After a deal covering Britain’s financial settlement, the Irish border and expatriate rights, the next stage on talks will cover future trade relations and a post-Brexit transition.

EU President Donald Tusk ack­nowledged the negotiations would also be a test for the bloc’s own unity, as it tries to push through a host of reforms after Britain’s departure.

“I have no doubt that the real test of our unity will be the second phase of the Brexit talks,” Tusk told reporters as he arrived at the summit.

He said a “lack of unity is very visible” on two key subjects facing the EU after Britain leaves: plans for a way forward on the migration crisis, and proposals for reforms of the eurozone.

European Commission chief Jean-Claude Juncker struck a deal with May on Brexit separation issues on Dec 8, saying Britain had made “sufficient progress” to move the talks onto trade.

May will tell leaders over dinner on Thursday that the agreement “required give and take by both sides, but a fair outcome has been achieved”, a senior British government official said.

She told reporters on arriving: “I’m looking forward to discussing that deep and special partnership for the future.” But Tusk warned earlier this week of a “furious race against time” to reach a deal before Britain leaves the bloc on March 29, 2019.

Published in Dawn, December 15th, 2017