Parliament must vote on whether the UK can start the process of leaving the EU, the High Court has ruled.
This means the government cannot trigger Article 50 of the Lisbon Treaty - beginning formal discussions with the EU - on its own.
Gina Miller, who brought the case, said outside the High Court that the government should make the "wise decision of not appealing".
She said: "The result today is about all of us. It's not about me or my team. It's about our United Kingdom and all our futures."
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