There's a new legal action over Brexit to be heard at the High Court today (Friday).
The core of the challenge is regarding the prospect of a so-called 'hard Brexit', and the case is brought by campaigners who want to keep Britain in the single market.
Among them is Peter Wilding, the chairman of the British Influence thinktank, alongside Conservative Leave campaigner Adrian Yalland and four anonymous applicants.
What makes this case different from last month's ruling in the Supreme Court is that it focuses on Article 127 of the treaty, relating to the UK's membership of the European Economic Area (EEA).
Being a member of the EEA allows for citizens of the European union to have free movement of people, goods, services and capital within the market.
The applicants are lobbying the court to rule that Parliement must also give its permission to pull the UK out of the EEA.
Yalland said: "I voted to leave the EU but Parliament did not intend the referendum to cover the issue of membership of the EEA.
"Hard Brexit risks Scotland leaving the UK. So Brexit gives us our country back but a hard Brexit risks breaking it up."