In my view, as a matter of law, the provisions relating to the timing of the efforts to be made in resolving withdrawal agreements make time of the essence in the negotiation of a subsequent agreement. A doctrine with which the lawyers in the House will be familiar is of legal relevance. In my opinion, the provisions of the joint instrument extend beyond mere interpretation of the withdrawal agreement, and represent materially new legal obligations and commitments which enhance its existing terms.
Let me now turn to the unilateral declaration. It records the United Kingdom’s position that, if it were not possible to conclude a subsequent agreement to replace the protocol because of a breach by the Union of its duty of good faith, it would be entitled to take measures to disapply the provisions of the protocol in accordance with the withdrawal agreement’s dispute resolution procedures and article 20, to which I have referred. There is no doubt, in my view, that the clarifications and amplified obligations contained in the joint statement and the unilateral declaration provide a substantive and binding reinforcement of the legal rights available to the UK in the event that the Union were to fail in its duties of good faith and best endeavours.
I have in this statement, and in the letter that I have published today, set out, frankly and candidly, my view of the legal effect of the new instruments that the Government have agreed with the Union. However, the matters of law affecting withdrawal can only inform what is essentially a political decision that each of us must make. This is a question not of the lawfulness of the Government’s action but of the prudence, as a matter of policy and political judgment, of entering into an international agreement on the terms proposed.