You're listening to a podcast from the BBC World Service. This is Hard Talk with me, Stephen Sacker.

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Welcome to Hard Talk on the BBC World Service with me, Stephen Sacker.

When historians reflect on Britain's protracted political struggle over Brexit, they will surely reserve a special mention for my guest today.

Businesswoman turned political campaigner Gina Miller. She came to this country as a child from British Guyana.

Her parents raised her to admire and respect the UK as a model of decency and parliamentary democracy

united in its respect for the rule of law. But the political fallout from the 2016 referendum,

which saw a narrow majority of Britons voting to leave the European Union, prompted Gina Miller

to question whether the British government was adhering to the

principles she held dear. Twice since the referendum, Ms. Miller has been at the forefront of

legal challenges to the government's Brexit strategy. Twice she won famous victories in the Supreme

Court. The first required the government to seek parliamentary

approval before formally launching the Brexit process. The second overturned Prime Minister

Boris Johnson's decision to suspend Parliament in September. While Ms Miller hasn't stopped Brexit,

her interventions have set precedents about the limits of executive authority

in Britain's parliamentary democracy, which may have significance for years to come. So how come

this non-politician has had such an impact on Britain's political landscape? Well, Gina Miller

joins me now. Welcome to Hard Talk.

Lovely to be here. Seems something very important happened to you after that June 2016 referendum,

which of course saw a majority voting for Brexit. You ceased to be just a concerned citizen looking

at the politics of Britain, you became an activist,

determined to use the law to make an intervention. What prompted that change?

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