The Liberal Democrats have said they will vote against a Government motion paving the way towards Brexit unless they get more clarity on plans for an exit.

The Labour motion commits the government to providing a plan before they trigger article 50 and was adopted by the Conservatives after Theresa May bowed to pressure for more detail on what a Brexit might look like.

Liberal Democrat leader Tim Farron said they would not back a "stitch-up" that did not include a "meaningful commitment" to provide more transparency through a White or Green Paper with various options for MPs to scrutinise.

We cannot support a parliamentary stitch-up that would deny the people a vote on the final deal. Tim Farron

His party has tabled a demand for a second referendum on the outcome of negotiations.

Meanwhile, the Scottish National Party and Plaid Cymru MPs are backing a further amendment which calls for "a formal role for the devolved administrations including their agreement before Article 50 is triggered".

It came as Green Party co-leader Caroline Lucas said she would vote against the Government amendment to back Mrs May's timetable for triggering Article 50.

Some remain-leaning Conservatives have including Anna Soubry have also called for a White Paper on the options.

Brexit minister David Davis can expect some searching questions from MPs as the motion is debated in parliament today.

However, it is likely to pass as it is backed by both the main parties.