Labour MPs have called on Boris Johnson to resign after judges ruled unanimously that he had illegally prorogued Parliament.
Lady Hale spoke for 11 judges when she said the Prime Minister's decision to ask the Queen to shut down the Commons for five weeks was "unlawful, void and of no effect", prompting Speaker John Bercow to vow to recall MPs to the Commons immediately.
Labour leader Jeremy Corbyn led calls for Mr Johnson to step down, saying the court's decision proved he had demonstrated "a contempt for democracy and an abuse of power."
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The party's MPs across the Black Country have also waded in.
Wolverhampton North East MP Emma Reynolds said: “This is a good day for our parliamentary democracy. The Prime Minister and our government are not above the law.
“It is unprecedented that the Supreme Court has unanimously ruled that the Prime Minister’s advice to the Queen to prorogue Parliament was unlawful and that Parliament’s suspension is in fact null and void.
"It is surely now time for the Prime Minister to resign. He has acted unlawfully.
"He has tried but failed to silence Parliament and now we must get back to scrutinising the government and preventing a catastrophic no deal Brexit."
#SupremeCourt judges rule unanimously that PM’s advice to Queen to prorogue Parliament & its suspension was “unlawful”. The effect on the fundamentals of our democracy was extreme.” The govt prevented parliament from carrying out its functions. Surely PM must now resign.— Emma Reynolds (@EmmaReynoldsMP) September 24, 2019
Pat McFadden, the MP for Wolverhampton South East, said: “This was a brutal and damning indictment of the Prime Minister and the Government by the highest court in the land.
"The judgement was remorseless in its logic - the decision to suspend Parliament was unlawful.
“Any Prime Minister faced with such a verdict should go, but he is likely to cling on. Parliament must be recalled immediately and allowed to do its job.
“And I hope in the wake of this judgement we don’t see a repeat of the “enemies of the people” monstering of the judges for doing their job.
"We have a system where Parliament makes the law and the courts independent of Parliament have the job of interpreting the law. We trash all that at our peril.”
Warley MP John Spellar said the court's decision had "restored Parliament against the stupid games of a couple of chancers – Cummings and Johnson – and laughably incompetent plotters at that."
Wolverhampton South West MP Eleanor Smith, said: "It's time to recall Parliament and end Boris Johnson and his cronies standing in the way of our democracy."
Labour deputy leader Tom Watson kept it simple, tweeting: "Boris Johnson should resign."
Meanwhile the Brexit Party said the result was a hammer blow to Britain's prospects of leaving the EU.
West Midlands MEP Andrew Kerr said: "I think Boris should resign immediately as the finding fundamentally undermines his credibility to hold the highest office in the land.
"This is the worst possible outcome for Boris Johnson, and will no doubt allow the Speaker to take control of Parliament, rather than the Government.
"I anticipate, as the Speaker and Parliament are pro-Remainers, the referendum result to leave the EU will be undermined to such an extent we will not be allowed to leave the EU in reality.
"I think we can also anticipate more similar legal challenges to Government decisions in the future."
Delivering the court's conclusions, Lady Hale, said: "The effect on the fundamentals of our democracy was extreme."
She added: "The decision to advise Her Majesty to prorogue Parliament was unlawful because it had the effect of frustrating or preventing the ability of Parliament to carry out its constitutional functions without reasonable justification."
Downing Street said it was "currently processing the verdict", with Mr Johnson, who is at the United Nations Climate Action Summit in New York, expected to make a statement later today.