"The effect on the fundamentals of our democracy was extreme."
The UK's highest court has ruled Boris Johnson broke the law by deciding to suspend Parliament for five weeks.
Mr Johnson suspended - or prorogued - Parliament for five weeks earlier this month, saying it was to allow a Queen's Speech to outline his new policies.
The Supreme Court in London says the shutdown took place in "exceptional circumstances" ahead of Brexit.
It's also found there was "no justification" for the suspension.
The court's president, Lady Hale, said: "The effect on the fundamentals of our democracy was extreme."
''The court is bound to conclude therefore that the decision to advise her Majesty to prorogue parliament was unlawful,'' she said.
''Because it had the effect of frustrating or preventing the ability of Parliament to carryout its constitutional functions without reasonable justification.''
