We've known for a while that law firm, Mishcon de Reya, was planning to launch a legal action challenging the legal process behind the UK's departure from the EU.
But we've learned this week that the lead case here is being brought by Gina MIller, founder of the True and Fair Campaign and investment firm SCM Direct.
Ed was joined by Gina Miller for more info.
There's a now week to go until the public votes in what is the most important once in a generation referendum on Britain's membership of the European Union. Juliette Foster, the host of Investment Perspectives, is joined on the line by the Secretary of State for Justice and prominent Leave campaigner, Michael Gove.
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