Diplomats and EU officials confident May will get extension until June 30th

Diplomats in Brussels expect EU leaders will accede to British prime minister Theresa May's latest request for a short negotiating extension to the Brexit process until June 30th.

The request, made in a letter on Friday morning to European Council president Donald Tusk as talks continued in Westminster between her government and the opposition Labour party, will go before leaders at an EU mini-summit in Brussels on Wednesday.

While official diplomatic sources were insisting the decision was one entirely for leaders and that some clarity from London was still required, following a meeting of EU ambassadors other diplomats and EU officials were confident Mrs May would get her extension.

Paris was more cautious. Sources close to French president Emmanuel Macron were warning that talk of an extension was still premature.

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Some diplomats were still wondering if Mrs May could commit her successor at the helm to maintain such a co-operative course

“Extension is a tool, not a solution,” an Elysee source was reported as saying, insisting that they were still awaiting “a credible plan” from Mrs May.

Her attempt to woo fellow leaders was not helped by an incendiary tweet from arch-Brexiteer Jacob Rees-Mogg, playing to the fears of many leaders that if still in the EU in a few months the UK could be hugely disruptive.

“If a long extension leaves us stuck in the EU we should be as difficult a possible,” he said. “We could veto any increase in the budget, obstruct the putative EU army and block Mr Macron’s integrationist schemes.”

Good member

In her letter Mrs May tries to reassure with an almost embarrassing promise that the UK will be a constructive good member “in accordance with the duty of sincere co-operation”.

Code for “no obstruction”.

However, some diplomats were still wondering if Mrs May could commit her successor at the helm to maintain such a co-operative course.

Mrs May’s letter also appears to preempt and block one element of what is understood to be key in Labour’s talks demands – a confirmatory referendum on any joint deal. That would not be possible before June 30th, and that time limit would seem to make agreement with Labour far more difficult.

At the summit leaders are also expected to discuss to the possibility of a longer indeterminate “flextension” to allow the UK to continue its membership and then leave when a deal is agreed. The idea, being suggested by sources close to Mr Tusk, would be an offer time-limited by as much as a year.

Among member states there is no clear consensus yet about the advisability of granting any long extension, with some fearing that a loosening of deadlines will simply allow MPs to put off confronting hard choices.

Mrs May also sets out the clear parameters for any discussions with the opposition in a framework spelled out by EU negotiators.

"I am clear that all of these discussions need to be based on acceptance of the withdrawal agreement without reopening it, as the United Kingdom agreed with the European Council at our last meeting, and should focus on the framework for the future relationship between the United Kingdom and the European Union, " she writes.

New approach

Keen to demonstrate that the British government is adopting a new approach – also required by EU leaders – she emphasises that “if a consensus is going to be found, compromise will be needed on all sides in the national interest”.

“If the talks do not lead to a single unified approach soon the government would instead look to establish a consensus on a small number of clear options on the future relationship that could be put to the house in a series of votes to determine which course to pursue.”

Acknowledging that the June 30th date brings them past the European elections, Mrs May accepts the legal obligation on the UK to contest these if the extension is granted. It will make preparations for the contest.

However, should agreement on a deal be reached before the May 23rd polling day allowing the UK to leave the EU, the UK would then cancel the polling.