MPs have been wished a “Merry Brexmas” despite warnings Brexit will not be done in the new year.

During the debate on the second reading of the European Union (Withdrawal Agreement) Bill, backbench Tory MP Rachel Maclean said: “I want to wish everybody a very Merry Brexmas.”

Former Cabinet Office minister and Remain voter Damian Green has urged MPs who also voted to stay in the EU to give up on their fight as “that game is over”.

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Mr Green said: “Those of us who voted for and campaigned for Remain should respect the result of the referendum.

“So to those of my friends on all sides of the House who up to now have not accepted the 2016 result, I would appeal that now, after this General Election result, please accept the decision, please let’s move on, please accept that that game is over.”

Labour’s Catherine McKinnell (Newcastle upon Tyne North) said the Conservative election slogan “Get Brexit Done” was misleading.

She added: “Brexit isn’t going to be done. The challenges of the next stage are infinitely more complex than the first.”

Matthew Pennycook, Labour MP for Greenwich and Woolwich, added: “There is no question it did its job, but after January 31 the slogan Get Brexit Done will be exposed as the fiction it is.

“Because when this Bill becomes law, as it will, it will not mean that Brexit is done, and every single honourable and right honourable member on the benches opposite who parrotted that line during the recent election campaign knows full well that is the case.

“Brexit is a process not an act and the passage of this legislation and the full implementation of the agreement by both parties is only the end of the beginning of that process and a prelude to a far more challenging phase of it.”

Ardent Brexiteer and chairman of the EU Scrutiny Committee in the last Parliament, Sir Bill Cash added that Brexit will be “a watershed moment in our history”.

Stating that remaining in the EU is “no good for this country”, Sir Bill added: “The reality is, Mr Speaker, that this is an historic moment – it compares to the decision that was taken when in 1660 the Cromwellian period was redefined, we came back into Parliamentary government.”

Sir Bill continued: “We have regained the right to govern ourselves.”

Delivering his maiden speech in the Commons, newly-elected SNP MP for Stirling Alyn Smith said today’s vote will go down in “infamy”.

He said: “This is a momentous day for some in this House. It is a day of deep sadness for many of us.

“I assure you today’s vote will live in infamy. It is not the end of Brexit. It’s the start of something far worse.”

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Tory MP Mark Francois, the deputy chairman of the pro-Brexit European Research Group, made a festive appeal in the Commons.

The Rayleigh and Wickford MP said: “The people have spoken and we will listen. We will do what they want and when the sun rises on February 1 it will do so on a free country.

“All I want for Christmas is not EU.”