British government to appeal court ruling on Brexit

The British government is to appeal against a High Court ruling that the prime minister must seek MPs’ approval to trigger the process of taking Britain out of the EU.

Campaigners were celebrating victory in the legal battle against Theresa May’s decision to use the royal prerogative in her Brexit strategy, with demands for her to now set out her negotiating strategy to MPs.

In one of the most important constitutional cases in generations, three senior judges ruled that the prime minister does not have power to use the prerogative to trigger Article 50 of the Lisbon Treaty to start the two-year process of negotiating Brexit without the prior authority of parliament.