In a series of tweets, shadow Brexit secretary Keir Starmer said: “There are four key reasons why you cannot separate the Withdrawal Agreement from the Political Declaration.
“First, the Article 50 process explicitly states that the EU and member state must negotiate an agreement ‘setting out the arrangements for its withdrawal, taking account of the framework for its future relationship with the Union’.
“Second, in their letter of 14 January Presidents Tusk and Juncker said: ‘As for the link between the Withdrawal Agreement and the Political Declaration….it can be made clear that these two documents, while being of a different nature, are part of the same negotiated package’.
“Third, the PM has said the two documents should be treated as one. On 14 January she said “the link between [the two documents] means that the commitments of one cannot be banked without the commitments of the other. The EU has been clear that they come as a package.
“Fourth, following the PM’s commitment yesterday to resign before the next phase of negotiations begin, if the withdrawal agreement passes without a credible plan for what happens next then Brexit is going to be determined by the outcome of the next Tory leadership contest.
“What the Government is doing is not in the national interest and that’s why we will not support it tomorrow.”
