The British High Court is to issue its verdict on Tuesday before Prime Minister Boris Johnson´s decision to give a compulsory recess to parliament.
The court made the announcement on Monday.
The court´s 11 judges will have to decide whether to intervene in the conflict between parliament and the government.If they decide to intervene, they will rule on whether Johnson broke the law by requesting Queen Elizabeth to enact a decision to grant Parliament a mandatory five-week recess.
At a hearing last week, the petitioner, Lord David Panick, demanded that MPs return to the meeting "as soon as possible."
Government attorney, Lord Richard Kean, warned the court not to issue a decision to this effect, noting that the case was a "no-man´s land" for the judiciary.
If the government is defeated in court, it will be a serious blow to the prime minister, which could lead to his resignation.
The Scottish High Court had accused Johnson of deceiving the queen over his real intentions of the decision to grant Parliament a mandatory holiday for a while.
The High Court in London dismissed a case against compulsory recess, saying the case was purely political.