Britain has hit a fresh snag on its way out the European door. As we know, Britain must trigger Article 50 of the Lisbon Treaty to leave the EU. But today's court ruling that parliament must vote on Article 50 has the potential to severely complicate an already complex process, if not to derail it entirely. Denis Staunton reports on the significance of the ruling and what it means for Prime Minister Theresa May.

If and when Brexit does proceed, a high price will be exacted by Europe for continues access to the common market, predicts former director of communications to David Cameron, Craig Oliver. Before the court ruling came down, Mark Hennessy talked to Craig, who has released a book, "Unleashing Demons: The Inside Story of Brexit". He tells Mark why he feels the referendum was an inevitability, and where he believes it all went wrong.