The businesswoman argued that it would be unlawful for the Government to start formal negotiations without first seeking the approval of MPs, which she said would go against “the letter of the law and sovereignty of Parliament”.
She took her argument to the High Court and won before the Government failed in challenging the verdict in the Supreme Court – the final court of appeal in Britain.
Ms Miller’s challenge attracted many critics, including Conservative MP Dominic Raab, who accused her of attempting to “steal the referendum by the back door”.
In an interview with the Sunday Mirror, Ms Miller claimed that one thug had offered £5,000 to anyone who killed her because of her court challenge.
Gina Miller claims she would work with the Government during Brexit negotiations
I would really like the Government to be more consultative with people such as myself
But that has not deterred her from remaining in the limelight and influencing Britain’s divorce negotiations with the European Union.
Speaking to DW, she said: “I would really like the Government or the ministers to be more transparent and to be more consultative with people such as myself, business people, people in financial services and different industries to understand the full impact of the different scenarios that Brexit could bring, and the different negotiation packages that could be achieved.”
In the wide-ranging interview, Ms Miller also covered the abuse that she had been subjected to since launching the challenge.
The businesswoman celebrating her victory against the Government said: “Today, eight of the 11 Supreme Court judges upheld the judgement handed down by the High Court in November, in a case that went to the very heart of our constitution, and how we are governed.
“Only parliament can grant right to the British people and only parliament can take them away.
“No prime minister, government, can expect to be unanswerable or unchallenged – Parliament alone is sovereign.”
Reflecting on her victory, the 51-year-old said she felt “intimidated” while standing on the steps of the court delivering the speech.
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“Coming out and making my statement was very intimidating because I had lots of people screaming and shouting in the background,” she added.
“The moment I got back into a taxi to go off there was a huge rise in my inbox, telephone calls – a huge rise of abuse, saying that I was being ‘undemocratic’, ‘how dare I hold the Government to account’ – I didn’t expect it to be so bad.”
Government Loses Brexit Vote Appeal Tue, January 24, 2017
Britain's most senior judges ruled that Prime Minister Theresa May does not have the power to trigger the formal process Article 50 for the UK's exit from the European Union without Parliament having a say.
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Issued by the Supreme Court of (top row, from the left) Lord Neuberger, Lord Mance, Lord Kerr, Lord Sumption, (bottom row, from the left) Lady Hale, Lord Clarke, Lord Wilson and Lord Hodge, who agreed with the majority decision that the Government could not trigger Article 50 without Parliamentary approval.
Despite the challenge, the Prime Minister looks set to have gained the support of the House of Commons, with it likely that she will publish a white paper on Thursday setting out her Brexit negotiation plans.
Mrs May’s offer of a white paper was intended to put an end to a modest rebellion by pro-European Conversative MPs in Wednesday’s vote, in which the Commons is expected to back a bill allowing the Government to proceed with triggering Article 50.
George Osborne, who “passionately” campaigned for Remain, told the Commons that not following the Prime Minister’s promise to deliver Brexit would “alienate people who already feel alienated” and could cause a “deep constitutional crisis”.
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