Britain said it would publish legislation on Thursday seeking parliament’s approval to begin formal break away talks with the European Union as Prime Minister Theresa May agreed to lawmakers’ demands to publish her Brexit plan.

The Supreme Court ruled on Tuesday that May must give parliament a vote before she can invoke Article 50 of the EU’s Lisbon Treaty, with Brexit minister David Davis promising a “straightforward” bill within days.

May said last week Britain would quit the EU’s single market when it leaves the union, charting a course for a clean break with the world’s largest trading bloc.

The Supreme Court ruled on Tuesday that May must give parliament a vote before she can invoke Article 50 of the EU’s Lisbon Treaty, with Brexit minister David Davis promising a “straightforward” bill within days.