The High Court has blocked a fresh attempt to challenge Brexit through the legal system.

Campaigners had argued that Parliament needed to separately give consent to take Britain out of the European Economic Area (EEA).

Although the single market was not mentioned in June’s referendum question, Theresa May says she will be taking the UK out of it on the back of the vote’s result. A number of countries sit outside the European Union but retain access to the EEA, most notably Norway.

Parliament is in the process of giving consent to the Government to trigger Article 50 and begin Brexit negotiations. The High Court previously ruled that MPs had to be given a vote on the process to delegate the power to the Government.

However, the new challenge, brought by Adrian Yalland and Peter Wilding, who runs pro-single market organisation British Influence, argues that the EEA is a separate organisation and should require separate consent. Other plaintiffs have also joined the challenge but asked not to be identified for fear of media backlash.

Judges have now refused consent for the challenge to go ahead and said they will give their reasons later.

Mr Yalland said: “I have campaigned for parliamentary sovereignty and accountable government for 20 years and now I want parliament to exercise its sovereignty by deciding if the UK should withdraw from the single market treaty.

“Parliament, not Government, took us into the treaty and so Parliament, not Government, must decide if and when we leave. I voted to leave the EU but Parliament did not intend the referendum to cover the issue of membership of the EEA. The Government should stop seeking to stretch the mandate to leave the EU to cover things Parliament did not intend the referendum to cover.

“The referendum was on membership of the EU, not the EEA, nor of [the European Court of Human Rights]. It was not an opinion poll on immigration. I want nothing less than Brexit. But anything more than Brexit is for Parliament to permit. The Government has a mandate, not a blank cheque. We are a parliamentary democracy, not an elected dictatorship.”

Gina Miller reveals shocking abuse since launching Article 50 Brexit legal challenge

A survey of MPs by Ipsos MORI released this week found that just 26 per cent of MPs thought the UK had to leave the single market to honour the referendum result. The vast majority did not hold this view.

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