The point is that we hope the backstop will never be used. If it is required, it should be for a temporary, limited period. The right hon. Gentleman asked how that can be guaranteed. In fact, there are limits to the extent to which the EU can rely on article 50 for the backstop—there are very real legal concerns on the EU side—but of course we expect that there is no deal until we have the whole deal. That includes not just the withdrawal agreement and the protocol on Northern Ireland, but clear steps and a clear pathway to the future relationship, which will provide the lasting, sustainable answer on the Northern Ireland issue by ensuring that we have frictionless trade.