Paul Ross asked Gina Miller why she "stuck her beak in" on Brexit in a tetchy interview this morning.
Miller, a businesswoman and campaigner, successfully lobbied the High Court to ensure the Government couldn't trigger Article 50 and begin Brexit negotiations without an act of Parliament.
The decision was upheld in the Supreme Court, and the bill - the European Union (Notification of Withdrawal) Bill - came into law earlier this year.
Our host asked Miller why she got so involved in the anti-Brexit campaign, given she had no intention of standing for Parliament.
Miller replied: “I fought for a legally-progressed Brexit.
"If I hadn’t stuck my beak in, we would have had a precedent set where any Prime Minister could have bypassed Parliament and [made] up rules as they go along with executive orders.
"I fought for Parliamentary sovereignty – something everyone was banging on the table about, but no one had the guts to stand up and defend."