Yes. What has been obvious is a change in willingness from the European Union to be actively working on those alternative arrangements. As my right hon. Friend has heard me say before, it was not possible to complete that work, with the timetable we currently have, pre 29 March. But the firm commitments that have been given in the documents we have negotiated now with the European Union show that willingness on its side to be actively working with us to find those alternative arrangements and to define them in a way that means that the backstop can indeed be replaced.