The Government is preparing four versions of a Brexit law to bring before Parliament, as ministers await the Supreme Court’s ruling on whether MPs and Lords must give their assent to Brexit.

The verdict will be announced on Tuesday and ministers want parliamentary proceedings on Brexit to begin as soon as possible.

Ministers are said to be resigned to losing their Supreme Court fight but are unclear on how much influence the judges will demand Parliament is given. The 12 justices could rule that one parliamentary vote would be sufficient or may insist a full Act of Parliament is required to withdraw Britain from the European Union – something that would involve much lengthier discussions.

Acts of Parliament must be approved by both the House of Commons and the House of Lords several times before they become law.

All four draft laws being prepared have been kept brief in an attempt to ensure the Bill is passed as quickly as possible, according to The Telegraph. Ms May has promised to trigger Article 50 by March at the latest.

One government minister said: “There are around four drafts. They all basically say the same thing – giving the Government the power to affect withdrawal from the European Union”.

“Even though the draftsmen have prepared drafts, we’re not regarding any of them as final until we know what the judgement says.

“We have no idea what the judges are going to say. The wording of the judgments is of extreme importance.”

Supreme Court Brexit Challenge Show all 13 1 /13 Supreme Court Brexit Challenge Supreme Court Brexit Challenge People wait to enter the public gallery outside the Supreme Court ahead of the challenge against a court ruling that Theresa May's government requires parliamentary approval to start the process of leaving the European Union, in Parliament Square, central London Reuters Supreme Court Brexit Challenge Gina Miller, co-founder of investment fund SCM Private arrives at the Supreme court in London on the first day of a four-day hearing Getty Supreme Court Brexit Challenge A man waves the EU flag in front of the Supreme Court Getty Supreme Court Brexit Challenge Satirical artist Kaya Mar poses with two of his paintings in front of the Supreme Court Getty Supreme Court Brexit Challenge Pro-Europe protestors dressed as Supreme Court Justices stand outside the Supreme Court ahead of the first day of a hearing into whether Parliament's consent is required before the Brexit process can begin. The eleven Supreme Court Justices will hear the government's appeal, following the High Court's recent decision that only Parliament can trigger Article 50 Getty Supreme Court Brexit Challenge The eleven Supreme Court Justices will hear the government's appeal, following the High Court's recent decision that only Parliament can trigger Article 50 Getty Supreme Court Brexit Challenge Businesswoman Gina Miller arrives at the Supreme Court ahead of the first day of a hearing into whether Parliament's consent is required before the Brexit process can begin Getty Supreme Court Brexit Challenge Attorney General Jeremy Wright arrives at the Supreme Court in London EPA Supreme Court Brexit Challenge Protesters outside the Supreme Court in London, where the Government is appealing against a ruling that the Prime Minister must seek MPs' approval to trigger the process of taking Britain out of the European Union PA wire Supreme Court Brexit Challenge A protesters wearing a judge's wigs and robes stands outside the Supreme Court ahead of the challenge against a court ruling that Theresa May's government requires parliamentary approval to start the process of leaving the European Union, in Parliament Square, central London Reuters Supreme Court Brexit Challenge A protester holds up a placard outside the Supreme Court ahead of the challenge against a court ruling that Theresa May's government requires parliamentary approval to start the process of leaving the European Union, in Parliament Square, central London Reuters Supreme Court Brexit Challenge Pro-Europe protestors dressed as Supreme Court Justices stand outside the Supreme Court Getty Supreme Court Brexit Challenge A man waiting to enter the public gallery waves a European Union flag outside the Supreme Court ahead of the challenge against a court ruling that Theresa May's government requires parliamentary approval to start the process of leaving the European Union, in Parliament Square, central London Reuters

The introduction of a full parliamentary bill would give MPs and Lords the opportunity to propose additions and amendments, potentially dictating what approach Ms May should take in negotiations with other EU member states.

Jeremy Corbyn has said his party will seek to amend Brexit legislation to ensure certain conditions are met, including access to the EU’s single market. The Labour leader refused to confirm whether he will whip his MPs to vote for in favour of a possible Brexit bill, having repeatedly said his party will not block the triggering of Article 50.

Tens of Labour MPs are expected to vote against Brexit regardless of what Mr Corbyn decides.

David Davis, the Secretary of State for Exiting the EU, will make a statement to MPs soon after the announcement of the Supreme Court ruling but the precise wording of any new law is not expected to be published until later in the week.