When the Examining Body for the Mooir Vannin Wind Farm released its Second Written Questions on 27 May, most of us expected another dense, technical round of clarifications. What we got instead was something far more explosive: a direct challenge to the economic foundations of the Mooir Vannin offshore wind farm — and, by extension, to the credibility of the Isle of Man Government’s entire offshore wind strategy.
Buried on page 11 of the 90‑page document is a question so blunt it reads like a cross‑examination. The inspectors demand that Ørsted, Treasury, the Department of Enterprise and the Department of Environment, Food & Agriculture “explain in plain terms what economic benefits… are being relied upon” in support of the project. They then go straight for the jugular:
“Is there reliance on anticipated income and revenue to the IoMG as a benefit in the planning balance?”
Examination Panel Written Question (WQ2 Q2.1.3.1(a))
This is not like a routine procedural query. It appears it is a warning shot.
For months, ministers and Ørsted have promoted Mooir Vannin as a transformational economic opportunity, repeatedly citing long‑term revenue projections of up to £2 billion. But the Examining Body is now asking whether those headline figures — the political centrepiece of the project — are even lawful to consider.
The inspectors’ next question makes the stakes unmistakable:
“Explain how that income is said to benefit the Isle of Man community, and what evidence supports that position.” (
Examination Panel Written Question (WQ2 Q2.1.3.1(b))
In other words: Show us the proof. Show us the mechanism. Show us the legal basis. Because without those, the entire economic case for this unpopular scheme, may collapse.
A Legal Trap Door
The Examining Body then cites two high profile planning law cases of the last 40 years: City of Bradford (1986) and Wright v Resilient Energy (2019). Their relevance is devastating. Both cases establish that:
- General revenue to a public authority is not a material planning benefit.
- Planning permission cannot be bought.
- Financial windfalls to government cannot lawfully be weighed in the planning balance.
The inspectors ask Ørsted and the Government to explain how these cases apply, “in particular on whether it would be lawful to consider any revenue generated as part of the planning balance.” (WQ2 Q2.1.3.1(d)) – This is the moment the ground shifts.
If the Government has been relying — explicitly or implicitly — on Treasury income to justify the project, the Examining Body is signalling that such arguments may be inadmissible. And if those arguments fall, what remains?
The 2014 Strategy Comes Under the Microscope
The inspectors also probe the Isle of Man Government’s own policy framework, asking whether there is a distinction between “economic benefit” and “public benefit” under the 2014 Offshore Wind Strategy, and whether the Applicant considers this distinction relevant to the Examination. (WQ2 Q2.1.3.1(c))
This is a subtle but quite lethal question. The 2014 Strategy was written as an economic development document, not as a planning policy. It talks about revenue, growth, and “optimising economic benefit of our seas”. But the Examining Body is now asking whether any of that is actually relevant — or indeed lawful — in a Marine Infrastructure Consent examination. If the answer is “no”, then the Government’s own strategy may be irrelevant to the planning balance.
That would be a political earthquake for those championing this scheme.
Scheme’s Benefits Are Overstated
The “Written Questions 2” (WQ2) document makes clear that this line of questioning is not theoretical. It arises “further to the discussions at SIH7… Garff Commissioners’ D3 submission… and several representations at the (Public Meeting) PbM2.” – This referring to the Specific Issue Hearing 7 and Public Meeting 2. (WQ2 Q2.1.3.1)
At those hearings, the Examining Body repeatedly pressed Ørsted on the robustness of its economic case. Members of the public and local authorities raised concerns that the project’s benefits were being overstated, unproven, or mischaracterised. The inspectors have now taken those concerns and turned them into a formal, legally binding demand for evidence.
Ørsted and Treasury must answer by 16 June.
Behind the Scenes Panic?
Multiple sources close to the process — speaking to Manx.News including planning professionals, legal observers and local commissioners — have privately described the inspectors’ questions as “devastating”, “a turning point”, and “the moment the economic case blew up”.
Here’s why:
The Government has repeatedly framed Mooir Vannin as a revenue generator.
If that revenue cannot be counted as a planning benefit, the political narrative collapses.
Ørsted’s economic modelling relies heavily on fiscal flows to the Isle of Man Government.
If those flows are irrelevant to the planning balance, the modelling becomes largely academic.
The Examining Body is signalling that it will apply strictly planning law.
That means no political gloss, no economic spin, and no “trust us, it’ll be good for the island”.
If the economic case weakens, the environmental case becomes decisive.
And the environmental case — as the rest of WQ2 makes clear — is already under severe pressure.
Legal Tension
There is a genuine legal tension at the heart of this issue. A benefit arising from a development is not automatically unlawful just because money is involved. The key test is whether the benefit is genuinely related to the development in planning terms, or whether it is simply a financial incentive being offered to secure consent — something the Supreme Court has made clear is not permissible in cases such as Wright and Bradford.
For Ørsted and the Isle of Man Government, the challenge is now sharply defined. If revenue to Treasury is being relied upon, they must explain why that revenue is a lawful planning consideration and how it meets the established legal tests for materiality. If they are not relying on Treasury income, then the other claimed benefits must stand on their own merits — and the Examining Body has asked for evidence, not assumptions, to support them.
Either way, the Examination is no longer accepting broad economic claims at face value. It is demanding clear justification, grounded in planning law, for every benefit said to weigh in the planning balance.
What Happens Next?
Ørsted and the Isle of Man Government now face a brutal choice: Admit that government revenue is not a planning benefit, and watch the economic case shrink dramatically; or Attempt to argue that revenue is a public benefit, and risk being contradicted by Supreme Court authority.
Either route is dangerous. The Examining Body’s questions are not rhetorical. Is this a signal that the panel is preparing to weigh — and possibly reject — the economic arguments that have dominated the public narrative? If that happens, Mooir Vannin will stand or fall on its environmental impacts alone. And that is a battle Ørsted has far from won.
Find out more and read all the questions the Examination Panel have posed:
https://mima.gov.im/mooir-vannin/document-library/examination/
