I totally agree with the hon. Gentleman about certainty. That was why I was explaining that we need to look at every area and sector, and every permutation and possibility. We talk about how we must do a deal—ideally, a bespoke deal that works for as many people as possible in the UK and the EU—but it may not be within our gift to do a deal. We talk about walking away, but if we do not sort out article 50 within the two years, we will walk away and no longer be members of the EU. That is what article 50 says and that is how it is.
People may talk in this debate, as they have in others, about whether article 50 is reversible. Now, I am not a lawyer but I am not too bad at grammar, and when I read article 50 I can see clearly that there is one way effectively to reverse it, and that is by getting the unanimous agreement of all the European countries to extend the deadline. That could be to something like 50 years—it could almost be like the lease on Hong Kong, with the issue pushed away to a time so far in the future that effectively we remain in the EU. Essentially, that is the only way.