THERESA May has pleaded with her MPs to back her Brexit deal so Brits can finally stop arguing about it - after leaders signed it off at a historic summit today.

As Britain moved a step closer to our exit, the Prime Minister insisted it was "time to move on" and her deal was "the only possible deal" that could be secured.

20 Theresa May insisted her deal would finally stop Britain bickering over Brexit Credit: AFP or licensors

At a press conference this lunchtime after meetings with other leaders she said in a direct pitch to her wavering MPs: "The British people don't want to spend any more time arguing about Brexit.

"This will allow us to come together again as a country."

After 18 months of political wrangling, heads of government were finally ready to sign and seal the deal today.

And Mrs May insisted that it was the only one available - as she geared up for the fight of her career to get it passed by MPs in the Commons.

100 Tory MPs alone are set to vote against it when it comes to the Commons, and DUP ally Arlene Foster threatened to bring down the government altogether by pulling the plug on their support.

EU27 has endorsed the Withdrawal Agreement and Political Declaration on the future EU-UK relations. — Charles Michel (@eucopresident) November 25, 2018

20 She said Brits wanted to 'move on' now and stop arguing Credit: Getty Images - Getty

20 Theresa May has arrived at the summit where EU leaders have finally signed off her deal Credit: Reuters

20 The PM will hold a press conference later today Credit: AP:Associated Press

20 Mrs May held talks with EU leaders ahead of an expected statement to the press on the signing of the deal Credit: EU

20 The Brexit deal was signed off by EU leaders this morning after a very brief meeting lasting just a few minutes Credit: Rex Features

20 Yesterday Theresa May in talks with other leaders - this morning it was given the green light Credit: Rex Features

Mrs May also dodged again questions on whether she would quit if her deal is rejected in the Commons, and slapped down more calls for a second referendum.

"I am focusing on ensuring that I make a case for this deal to MPs," she added, saying she was "full of optimism about the future of our country."

"This is a deal that's the result of what has been tough and difficult negotiations over a significant period of time and as has been said this is the deal that's on the table, this is the best possible deal, it's the only possible deal," she stressed. And she said the British people would "understand" that "in any negotiation, you do not get everything you want". She vowed that her agreement would end freedom of movement "once and for all", would protect the UK and take back control of our money and laws. 20 Jean Claude Juncker warned MPs that they would be 'disappointed' if they thought they could get a better deal Credit: Getty Images - Getty On another crucial day for Brexit: The Lithuanian President said there could be a second referendum if the deal was thrown out by MPs, as other leaders warned it was the best deal the bloc could offer

EU leaders warned it was a "only deal" the country would get - and attempts to renegotiate would get thrown out in seconds

But France's Emmanuel Macron risked Brexiteer fury by saying the EU WILL use Irish backstop to force us to roll over on giving access to our waters in future

It was revealed that Remainer Cabinet ministers have formed a new 'gang of five' to try and force the PM to accept an even softer Brexit if her deal gets wrecked by MPs in the Commons

Jeremy Corbyn said Labour would oppose the deal which he called a "miserable failure"

Tony Blair claimed Labour will end up backing another referendum on Brexit

EU boss Jean Claude Juncker forcefully warned MPs that there was no other option up for grabs in a press conference just minutes before Mrs May.

He said: "This is the best deal we could have achieved."

He went on: "Those who think by rejecting the deal they would have a better deal will be disappointed."

And his EU colleague Michel Barnier told MPs it was time for "everybody to take their responsibilities" as leaders joined a charm offensive to try and help Mrs May seal it all off.

The Frenchman insisted to reporters that "we will remain allies, partners and friends" after spending months getting the 600-page deal ready.

But Mr Macron vowed to fight for access to Britain's waters in a future trade deal.

He said the issue would be a "key point of future negotiations" and insisted the French would "defend access as part of the indispensable balance".

Jean Claude Juncker warns MPs not to vote down deal to try and get a better one

20 The EU warned MPs that this was the only option on the table and the best deal possible Credit: Reuters

20 Emmanuel Macron risked fury by saying he would fight for continued fishing access for the French Credit: Reuters

20 Michel Barnier and Jean Claude Juncker celebrate with a hug at this morning's Brussels gathering Credit: AFP or licensors

20 French President Macron with the EU's Michel Barnier Credit: AP:Associated Press

20 German Chancellor Angela Merkel was there to oversee the historic deal get signed off Credit: Reuters

Mrs May will now embark on a PR blitz this week to sell her deal to the nation.

In a letter to Brits today Mrs May said she would campaign with "heart and soul" to get her Brexit deal through Parliament.

She wrote: "It will be a deal that is in our national interest one that works for our whole country and all of our people, whether you voted Leave or Remain."

She has copied Tony Blair’s election-winning pledge cards as she goes flat out to sell her EU divorce plan - dubbed a “sell-out” by critics - to Britain.

Brexit Minister Lord Callanan told The World This Weekend: "There is no Plan B. This is the plan, this is the deal."

But Brexiteers have warned her they will still vote it down when it comes to the Commons.

Iain Duncan Smith said this morning that "far too much has been given to the EU".

"Right now the balance is definitely tilted against this being a deal, I'm afraid, that delivers on what the Government said they would deliver," he told Sky News' Sophy Ridge on Sunday.

What happens next? THIS WEEK: Theresa May embarks on a PR blitz to sell her deal NEXT MONTH: MPs vote on the deal in the House of Commons. If it's voted down ministers have 21 days to issue a statement and come up with a plan B. FEBRUARY: European Parliament likely to vote on the agreement MARCH 2019: Britain officially leaves the EU at 11pm and enters transition period JANUARY 2021: Transition period ends and Britain hopes to have trade deal with the EU in place to take over

20 Theresa May has now left the summit to return to Britain to try and sell her deal Credit: AFP or licensors

20 Dalia Grybauskaite warned that anything could happen if MPs torpedo the deal Credit: Reuters

20 Michel Barnier arriving for the summit to sign off the deal he has negotiated for the last 18 months Credit: AP:Associated Press

Meanwhile, one EU leader warned that another Brexit vote or even another election could be on the cards if MPs throw out Theresa May's deal.

Lithuanian President Dalia Grybauskaitė said another vote, an election or more negotiations were possible if MPs torpedo it in the Commons.

She said this morning: "We are going to agree on the withdrawal agreement. And then of course it will be for Britain to decide what to do next...

"It could be a second vote of the people, it could be new elections, it could be a request for renegotiations, there is at least four scenarios, I calculate."

But Dutch PM Mark Rutte said he was "absolutely confident" that Theresa May's deal would be able to pass.

He said the deal was the "max we can all do" and didn't think there was any hope of reopening talks if the agreement failed to be signed off by MPs.

Second Brexit referendum possible if Theresa May's deal thrown out, Lithuanian PM says

20 Jean Claude Juncker said this deal was the 'best deal possible' Credit: Reuters

20 French President Emmanuel Macron admitted Brexit showed the EU needed to be reformed Credit: Reuters

20 The PM has written a letter to the nation trying to win the case for her deal

20 She vowed it would be a good deal for Leavers and Remainers alike

MOST READ IN POLITICS Latest NATION LOCKED DOWN Cardiff, Swansea, Leeds and Wigan all placed in lockdown Latest COVID SPREADING Sadiq Khan demands London household mixing BAN as city on covid watchlist CHIN-AID Britain spent £67.8million on 'overseas aid' for China last year furlough 2.0 Rishi announces furlough plan where workers get 77% pay for doing 1/3 hours Latest 'PERILOUS POINT' PM warns stricter rules likely to last 6 MONTHS ruining Xmas for millions THANK YOU, NEXT Next CEO warns risk of getting 'hooked' on furlough & job cuts 'inevitable' XMAS FEAR Uni students could be banned from going home for Christmas due to coronavirus JOBS RISK Major flaw in new furlough could mean more job cuts, think tank warns REALITY CHEQUE Chancellor admits new £5bn furlough plan won't stop mass job losses LOCKED UP AGAIN New lockdown rules explained: Everything you can and can't do now

Yesterday Spanish PM Pedro Sanchez threatened to "veto" the agreement over Gibraltar but pulled his opposition to it at the last minute after he said he secured more assurances from Brits.

He gloated after today's sealing of the Brexit deal: "In relation with Gibraltar, Spain wins, and Europe wins."

Mrs May gave way to demands and acknowledged that Gibraltar won't necessarily be covered by a future trade deal with the EU, giving Spain hopes of renegotiating the territory in future.

But Brussels officials said Spain had always been set to have a say in a future trade pact.

Theresa May arrives in Brussels to seal Brexit deal after Spain backs down over Gibraltar

We pay for your stories! Do you have a story for The Sun Online news team? Email us at tips@the-sun.co.uk or call 0207 782 4368 . We pay for videos too. Click here to upload yours