So, the PM is prepared to go to war on Spain over the status of Gibraltar, is she? (Well, “showing the Falklands resolve” isn’t quite the same thing, but you get the point.) We will fight for the rights and sovereignty of Gibraltar, will we? And what exactly is this to look like? The referendum result has dumped Gibraltar and the government now has to try to square a very round circle.

About ten days ago there was a debate in the House of Lords on the question of Gibraltar in the wake of Brexit. The report itself was good, clear and helpful, but one or two of the questions arising from it needed (I believed) to be pressed. Members of the Gibraltar government sat in on the debate. I have never been there and have not previously had a great interest in the place.

However, the challenge to Gibraltar seemed to me to focus on one of the major problems we face as we negotiate our departure from the European Union: realism. The government keeps issuing bland statements of optimism, but neglects to articulate clearly the fact that it has little or no control over delivery of a desired outcome. So, this is the text of my speech:

My Lords, I endorse all that has been said so eloquently. The report is excellent, but for me it raises a number of questions. The main one concerns the fact that throughout the referendum campaign, and subsequently, we have repeatedly heard statements such as, “We will get a good deal”, and, “We will do this and we will do that”, when in fact we do not hold the power in a lot of this—it will have to be negotiated.

Despite urging that we get the best for Gibraltar, I want to be assured that the Government is stress-testing all the scenarios, including the worst-case ones. We owe it to the people of Gibraltar to do that because it was not done in preparation for the referendum itself.

If you look through the eyes of Spain, you find that it is not good enough for us simply to say, “We mustn’t compromise on sovereignty”. What if the Spanish hold out sovereignty, play a long game and say, “We’ll just sit this out. We won’t give equivalence”? What if the EU does not give Gibraltar equivalent status? What if Spain wants to use sovereignty or cross-border access and frontier issues as a bargaining chip? We cannot simply stand there and say, “Well, you can’t”. I want to know that we are stress-testing this. Who has the power? After all, we have spoken of having a clean Brexit; what if the Spanish take us at our word? That has to be thought through and our response to it considered.

Particular questions are raised here. As I indicated, if the EU declines to give equivalent status after Brexit, what then? What is the cost to the UK, already alluded to in this debate, if Gibraltar is given no access in future to EU programmes? Has that been costed out? In paragraph 29 of the report, we read about the strong economic links to the UK, specifically the City, should the single market be infringed in some way. But what if the City effectively moves to Frankfurt or Paris? We keep saying, “Well, it won’t”, but what if it does? We do not hold all the cards.

Paragraph 36 says that, if access to the single market is restricted,

“the rest of the world beckons”.

So does outer space. It does not mean that we can get what we want. Where is the realism that comes from looking through the eyes of those who do not hold the best interests of the UK as their priority?

Paragraph 50 says that, for Spain to intensify border controls would be regarded as an “aggressive act”. Frankly, why should it not? It did not choose this. I suspect that, if the boot were on the other foot, we might be rather aggressive as well.

I just want to be reassured that these scenarios are being stress-tested in the way that they were not before we went into this business in the first place. We owe it to the people of Gibraltar.

I pressed similar questions a day or two later in respect of the environment, agriculture and the ending of subsidies for farming in parts of my diocese.

My point (not as articulately put as it should be, I admit) is that we need all scenarios stress-tested – including the worst-case ones – in order not to feed people with false promises that we cannot deliver. The triggering of Article 50 has not “taken back control”, but has handed it to the 27 EU countries who will, rightly, now look to their own best interests (as the UK would have done if, for example, France had unilaterally decided to depart).

If the UK is to prepare – and that does not mean just government – then we need to know the best and worst options that lie before us.