LONDON – British Prime Minister Theresa May's government launches a challenge on Monday against a court ruling that it requires parliamentary approval to start the process of leaving the European Union, a decision that could upset Britain's Brexit plans.
If the Supreme Court, the United Kingdom's highest judicial body, dismisses the government appeal it could derail May's timetable for triggering Article 50 of the Lisbon Treaty and leaving the EU.
The government's legal fight comes against a backdrop of claims by some politicians and newspapers that establishment judges want to thwart the Brexit process.
It will be the most high-profile and complex case the court has considered since it came into being seven years ago and is due to last for four days. For the first time all its 11 justices will sit on the panel with the verdict due later in January.
"The case raises difficult and delicate issues about the constitutional relationship between government and parliament," Brenda Hale, the Supreme Court's Vice-President said in a speech last month.
"What is meant by the exercise of the executive power of the state? We do not have a written constitution to tell us the answer. But I doubt whether many written constitutions would tell us the answer either."
If May wins, she can proceed with her plans to invoke Article 50 by the end of March.
But if she loses, parliament could in theory block Brexit as most lawmakers (MPs) supported staying in the EU in a referendum in June, though few observers expect such an outcome. Even so, lawmaker approval could open the process to greater scrutiny and delay. (Reuters)