Theresa May has been making a habit of saying different things – sometimes diametrically opposite things – to different people in her increasingly strident attempts to bludgeon down resistance against her toxic Withdrawal Agreement. To Remainers she has been saying that voting against her deal will lead to a no-deal exit; while at the same time telling Brexit supporters that voting against her deal will lead to no Brexit, or at least to a long extension. The latest example of this kind of tactic came when it was reported in The Times on Friday 5th April that “Senior ministers told their Labour counterparts yesterday that Theresa May’s Brexit deal with the European Union already includes a customs union ‘in all but name’.” This is the very same deal which Theresa May has spent the last few months assuring Brexit supporters would not require the UK to be in a customs union with the EU and would allow the UK to pursue an independent trade policy. It is this persistent but transparent duplicity – transparent in the sense that a two-year old child could see through it – which has destroyed the credibility of the Prime Minister and eliminated any trust in her on the part of her country, her party, or for that matter the EU leaders with whom she tries to negotiate. So which is right? In this instance of the customs union and her deal, what senior ministers told the Labour Party is true and what the Government has been telling Conservatives and Brexit supporters is not. As I explain here, the backstop Protocol is a customs union, so if we cannot do a long-term deal with the EU, then we will automatically fall into it and will be stuck there until the EU lets us out. And the Political Declaration which sets out certain aspects of our long-term relationship requires the UK to submit to a customs arrangement built on the backstop, and rules out a conventional Canada-style Free Trade Agreement. Moreover, the legal linkage between the Withdrawal Agreement and the Political Declaration means that the EU will be legally entitled to require the UK to enter the backstop and stay there indefinitely if the UK tries to secure a long term agreement which departs from the Political Declaration. State aid controls There is another aspect of the Withdrawal Agreement which it seems the Government has not been so keen to explain to the Labour Party – that is its provisions on State aid controls. These controls would fully apply during the transition period, but then the UK would be compelled to carry on applying EU rules on State aid even after we have left the transition period as part of the backstop. The European Commission would “supervise” the way the UK’s Competition and Markets Authority carries out its task. We would continue to be bound by the judgments of the European Court of Justice on the ever-expanding scope of EU State aid rules. Paragraph 79 of the Political Declaration requires the UK to incorporate into our long-term agreement with the EU State aid rules “built on” those in the backstop. So we would be unable to escape from these rules even if we negotiate our way out of the backstop. My advice to the Labour Party is “read the small print before signing anything”. But deep worry about a foreign power exercising these State aid controls over the UK should not be confined to socialists intent on subsidising and nationalising industries. They strike directly against pro-competitive tax policies introduced by the Conservative Government. On 2nd April, the European Commission announced a finding that the UK’s “controlled foreign company” tax rules breach EU State aid rules. This has been greeted with a Sunday Times headline: “Brussels lands FTSE giants with £1bn tax bill”. The absurdity of this situation is that if Theresa May had not chosen to exercise prerogative powers in a legally questionable and constitutionally unacceptable way to extend Article 50, we would have left the EU on 29th March and the European Commission would have been powerless to make a finding against the UK on 2nd April. As it is, the Commission will be able to pursue us on this issue for as long as we stay in an Article 50 extension. If we were to agree to Theresa May’s Withdrawal Agreement then the Commission could carry on pursuing us throughout the transition period and indeed would be entitled to bring a case against us in the ECJ up to four years after the end of the transition period. It is impossible to understand why a term so detrimental to the UK’s national interest was ever agreed, in what must amount to the most incompetently conducted negotiation in the history of the world. Can we get out of a customs union? The Attorney General Geoffrey Cox QC seems to have become something of an advocate for staying in a customs union with the EU, as a possible route for leaving the EU. In an interview with Laura Kuenssberg on 3rd April, Geoffrey Cox claimed that if, “in some considerable years time”, we wanted to leave that customs union then “There’s nothing to stop us removing ourselves from that arrangement, so we can’t look at these things as permanent straitjackets upon this country.” This is a very important claim, and it needs to be looked at very carefully before it can be accepted. A normal customs union treaty, like all trade treaties, would contain a notice clause – so we could leave a normal customs union agreement if we wanted to. But the problem is and remains the Withdrawal Agreement and its backstop Protocol which, as Geoffrey Cox rightly acknowledges, allows the EU to lock us in indefinitely. If the Prime Minister’s proposal were to strip the backstop Protocol out of the Withdrawal Agreement and replace it with a customs union agreement with a notice clause, then what Geoffrey Cox says would be true. However, it seems that that is not what the Prime Minister is proposing. She apparently wants to keep the legally-binding Withdrawal Agreement and backstop Protocol, and, to appease Jeremy Corbyn, to add an explicit commitment by the UK to enter into a long-term customs union agreement on top of that. And why, in those circumstances, would the EU agree to include a normal notice clause in the customs union agreement? That would provide to the UK an escape route from the Irish backstop which would be blindingly obvious to the EU. So instead of a normal notice clause, they will insist on a clause which reinstates the backstop Protocol if the UK drops out of the Customs Union agreement. The EU will argue that this is necessary to protect the peace process etc. etc., if the UK ever decides to leave the Customs Union. There does not seem any legal way of preventing the EU from insisting on this. Our negotiating position will be incredibly weak, given that if we do not agree to the terms on which they insist for the future relationship agreement then we will drop automatically into the backstop Protocol and stay there indefinitely. From the EU’s perspective, it is hard to see why they would ever give up the backstop Protocol if we are foolish enough to agree to it becoming binding. It will act as a permanent dog leash with which the EU can restrain the UK’s international trade policy and competitiveness, which sill sit behind any trade agreement we do with the EU. If the Attorney General wishes to persist in making claims that “there’s nothing to stop us removing ourselves from” a customs union, then he needs to explain exactly how we can escape from the backstop trap. Conclusion This illustrates the fact that the real poison in the deal which Theresa May has negotiated with the EU is the legally-binding Withdrawal Agreement and its backstop Protocol with no unilateral exit clause. For inexplicable reasons, she seems determined to persist in inflicting this unprecedented treaty on the United Kingdom, regardless of the form of the future relationship with the EU.