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The anti-Brexit campaigner, who won a Supreme Court case ensuring Theresa May could not begin official talks without parliamentary consent, said she was “bitterly disappointed” the legislation had been passed unamended. The unelected House of Lords backed down over the issues of securing EU residents’ rights and a meaningful vote on the final Brexit deal on Monday. The Prime Minister is now poised to begin the UK’s divorce from the bloc and has promised Parliament will be given a vote on any eventual deal.

GETTY•SKY NEWS Gina Miller warned she would take the UK Government back to court over Brexit

I will take them back to court to find out whether they can do as they are intending to do Gina Miller

However, a seething Ms Miller warned she would not hesitate to return to the courts if such commitment was not delivered on. Speaking on Sky News on Tuesday, the businesswoman argued: “The political landscape will change incredibly over the next 18 months. “The judgement in my case was very clear, only Parliament and an act of Parliament can do when it comes to people’s rights being changed. “That’s what will happen when that negotiated package comes back, so a resolution won’t do, a promise won’t do, if they don’t deliver on that I will take them back to court to find out whether they can do as they are intending to do.”

SKY NEWS The businesswoman is demand a final vote in Parliament on the Brexit deal in 2019

On Monday, MPs rejected recommendations by the House of Lords to amend the bill intended to give the Government legal power to begin the Brexit process. Ms Miller, who previously admitted spending more than £200,000 on fighting the Brexit process, raged at politicians for passing the legislation unamended. She continued: “Everything I’ve invested in this, I’ve taken the horse to water, they didn’t necessarily drink, but if they fail to scrutinise the Government on the Brexit passage then I will seek the certainty of courts.”

Things you may not know about remoaner Gina Miller Thu, March 2, 2017 Gina Miller is leading the challenge that has blocked Theresa May triggering Article 50 without the consent of Parliament Play slideshow Getty 1 of 10 Gina Miller has won the case to block Theresa May from Article 50