PMQs
David Lidington and Emily Thornberry will go head to head in the House of Commons Getty Images

With Prime Minister Theresa May in Bahrain making the case for a technicolour Brexit, leader of the House of Commons David Lidington has been asked to step up for today's (7 December) Prime Minister's Questions, which starts at 12pm GMT.

Lidington will be met across the dispatch box by Shadow Foreign Secretary Emily Thornberry – and nobody is expecting a classic encounter. There are suggestions that Jeremy Corbyn's decision to give Thornberry the responsibility is a snub for Labour's Deputy Leader Tom Watson.

The PMQs is only an appetiser for something much juicier: the Opposition Day debate concerning the government's plan for Brexit, which will take place in the Main Chamber around 1pm GMT.

The motion, tabled by shadow Brexit Secretary Keir Starmer, calls on the government to publish a plan for leaving the EU before Article 50 is triggered. Yesterday, faced with a revolt of up to 40 of her own MPs, May committed to revealing a plan but added an amendment to the motion that called on all MPs to "respect the wishes of the UK as expressed in the referendum on 23 June." Starmer described the move as a "significant 11th-hour concession."

Brexit minister David Davis will reply to the motion on behalf of the government and he is expected to be under the cosh as Members from all sides vent their frustrations at the absence of detail emanating from Downing Street. However, both Labour and the Tory rebels have indicated that they will support the amendment.

Meanwhile at the Supreme Court, the government's appeal continues against a High Court ruling that it does not have prerogative powers to invoke Article 50 without parliamentary approval.