Vital advice ahead of departure from EU

deal on trade and she said that would be a “catastrophe”.

She said: “There are some in Westminster who would wish to delay or even stop Brexit and who will use every device available to them to do so.

“I ask them to consider the consequences of their actions on the faith of the British people in our democracy. People’s faith in the democratic process and their politicians would suffer catastrophic harm.

“We all have a duty to implement the result of the referendum.”

Labour could trigger a vote of no confidence in the Government if the deal is voted down.

Leader Jeremy Corbyn said he wants a General Election for Labour to then take over negotiations with the EU.

Shadow Chancellor John McDonnell, however said that a second referendum could not be ruled out.

The Prime Minister’s allies in government have been trying to rally Tory MPs as she looks to win enough support the get the deal passed.

Meanwhile, the SNP, who will vote against the deal, have said that a second referendum has to take place.

Ian Blackford, SNP Westminster leader, said: “It is clear that there is no support for the Prime Minister’s deal or for no-deal.

“The only option now is to extend Article 50 and let the people decide through a second EU referendum.”

A new survey has found that more people support a second referendum than oppose one.

The Survation Poll found that 46 per cent backed a second referendum on Brexit after the Commons vote takes place and 34 per cent opposed it.