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Jeremy Corbyn demanded “real answers” from Theresa May on her Brexit plan today.

The Prime Minister pledged to trigger Article 50 by the end of March regardless of whether the Supreme Court rules she needs the approval of Parliament in January.

But she wouldn’t reveal when she’ll tell MPs her plan for leaving the EU or how long the process of withdrawal will take.

Mr Corbyn said Mrs May and the UK are becoming "increasingly isolated" on the international stage.

He said: "As we move swiftly towards the triggering of Article 50, I want to appeal to the Prime Minister to not only work hard to heal those divisions in Britain but also to make sure her new year's resolution includes a commitment to build better relations with our European partners, so we get the best deal for the people of this country - not just a Brexit which benefits business and bankers.

"At the moment it's clear on the international stage the Prime Minister and Britain are becoming increasingly isolated."

The Opposition leader said his talks with European leaders have shown they are becoming "increasingly frustrated" by Mrs May's "shambolic Government and the contradictory approach" to Brexit negotiations.

He told the PM: "The mixed messages from your frontbench only add to the confusion. This Government fails to speak for the whole country.

"Instead we hear a babble of voices speaking for themselves and their vested interests."

The Labour leader also questioned if the UK will have to pay 50 billion euros to honour EU budget commitments until 2020.

On EU citizens in the UK, Mr Corbyn asked the Government to "end the worry and uncertainty" by guaranteeing their rights before Article 50 is triggered.

Mr Corbyn also claimed "confidence is being lost" as he pointed to Office for Budget Responsibility forecasts for 2017, noting growth, wages and business investment have been revised down.

But Mrs May insisted the UK’s negotiating hand would be damaged by revealing it to MPs in advance.

She also said: "You talked about the question of EU funds and EU funds that are currently intended to continue beyond the date at which we would be leaving the European Union.

"The Chancellor of the Exchequer set out very clearly some weeks ago what the position on this was - those funds will continue to be met provided they give value for money and meet the UK Government's objectives."

Mrs May said the Brexit process can take up to two years once triggered, with progress of the negotiations affecting the time needed.

She defended the UK's economic record, telling MPs it has the "fastest-growing" economy this year in the G7 before listing companies which have announced investment since June's referendum - including Nissan.

Mrs May added to Mr Corbyn: "Then you talk about confusion on the frontbench.

"Well, you've obviously been looking at your own frontbench when you consider this matter.

"Let's just take one very simple issue of immigration. The shadow home secretary (Diane Abbott) suggests freedom of movement should be maintained. The shadow chancellor (John McDonnell) said we should have a fair deal on freedom of movement. The shadow Brexit secretary (Sir Keir Starmer) said we should have immigration controls.

"They can't even agree on one aspect of the United Kingdom leaving the European Union.

"What I know is with your negotiation techniques if you were in office we'd sure as goodness be getting the worst possible deal that we could get for the United Kingdom."

MPs voted last week to back the plan to trigger Article 50 by the end of March - on the grounds that Mrs May would share the Government's objectives for the negotiations.

It was initially thought details would be published either side of the Christmas break, which begins on Wednesday.

But Today Mrs May wouldn't be drawn on the timetable - leaving MPs uncertain of how long they will have to scrutinise the plan before the Brexit process starts.