Brexit is to be challenged in court for the first time, in a case against the Government's right to trigger Article 50 without parliamentary approval.
The High Court will hear whether Theresa May has the power to take the UK out of the EU without MPs voting on it. The case has been brought forward by Gina Miller, an investment banker, among others.
The Tory MP Dominic Raab has accused Miller of "a special kind of arrogance" in launching her challenge. In an interview on the Today programme Mr Raab said: “Parliament doesn't get a veto on beginning the Brexit negotiations. Frankly, I think this is a pretty naked attempt to steal the referendum by the back door."
Follow the latest updates on the legal challenge below: