London Big Ben
© ESB Professional/ShutterstockThe "Brexit' bridge, Article 50.
Prime Minister Theresa May has already got her ministers preparing the first draft of a bill to trigger Article 50, which will kick off the two-year process for leaving the EU, following a High Court ruling that Brexit must be put to a parliamentary vote. Senior government sources told Sky news that Downing Street has begun work on a draft bill in order to push the legislation through parliament before May's self-imposed March 2017 deadline for invoking Article 50.

Primary legislation could take six weeks to clear both Houses of Parliament and is subject to amendments, which could lead to significant delays. Downing Street has said it plans to appeal last week's High Court decision, but declined to say whether ministers are drafting the legislation to be put before parliament in case it loses its Supreme Court appeal.

On Monday, Shadow Brexit Secretary Keir Starmer said Labour would not block a Brexit bill, but called for greater transparency from the government on the process of withdrawing from the EU. "We will not frustrate the process by simply voting down Article 50, but we're absolutely clear that before we get to that stage the government must put its plan before Parliament," he told BBC Radio 4.

"We can't have a vote in a vacuum, and we can't proceed with this approach where the prime minister says 'I hold all the cards for the future of the UK in Europe and its relationship with Europe, and indeed in the world, and I'm not going to disclose even the basic terms of our departure.' So of course we need that discussion."


Brexit Secretary David Davis is due to address the House of Commons on Monday afternoon, outlining the government's official response to the High Court ruling. The Supreme Court appeal is expected to take place next month. Ministers argue they do not need the consent of parliament because the result of June referendum patently gave the government the mandate to invoke Article 50.