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The RAF is on standby to fly Theresa May to Brussels at a “moment’s notice” to save her Brexit deal as talks go to the wire.

A BAe 146 transport plane at RAF Northolt would take her to meet EU officials to respond to a breakthrough – or to force movement, sources say.

Talks are still “intense”, with the PM updated in the early hours yesterday.

More are due today but fears are growing they will stall again.

Labour estimates she could lose by 150 votes when her new deal is put to MPs on Tuesday.

(Image: Rex Features)

Shadow Brexit Secretary Keir Starmer today tells the Sunday Mirror it would be “another humiliation” after she lost a first vote 432 to 202 in January – the biggest Government defeat ever.

And one senior Tory said: “The scale looks like it will be catastrophic. No one knows what happens if she goes down by that margin.”

Sources say she hopes to win over 40 Labour MPs – and is still offering cash for “left behind” towns. But the EU appeared to block her latest call for help.

(Image: Rex Features)

Chief negotiator Michel Barnier said he was “working intensively” and reassured the UK it was free to leave a single customs territory.

But Mrs May and the DUP rejected that because Northern Ireland would remain in it.

Senior Tories have begun a bid to win the vote without concessions.

Chancellor Philip Hammond insisted no one in the EU “thinks the UK could be held in perpetuity in an arrangement detrimental to it.”