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World’s largest offshore wind farm ‘unprofitable’, government-funded report confirms

Net Zero Watch

London, 20 November — A report  commissioned by the Norwegian government has contradicted Boris Johnson’s recent claim in Parliament that offshore wind costs have fallen by 70% in a decade.

It confirms that the UK’s newest offshore wind farms remain high-cost operations. Indeed, the academics who produced the report have said the forthcoming Dogger Bank wind farms will be unprofitable, and are essentially worthless, with a value of around minus £1 billion in current terms.
Remarkably, the findings have not been disputed by the developers. 

The findings, however, are just the visible tip of a very large iceberg of unprofitable offshore wind projects that are threatening to hit pension funds that have invested in similar renewable energy schemes.

The report confirms as series of findings published by the GWPF and others [1–5], which show that offshore wind costs are very high, at best are only falling slowly, and are far above the auction strike prices being agreed.

Andrew Montford, Deputy Director of Net Zero Watch said:

“We have been warning since 2017 that there has been no revolution in offshore wind costs. Every time we get new financial data from offshore wind farms, the cost estimates go up. Just this week, our estimates for the Seagreen 1 wind farm have increased by nearly 20%, and those for Dogger Bank by a similar amount.”

The Government’s Net Zero plans rely on a five-fold increase in the wind fleet, mostly from offshore developments, and an extraordinary decline in the cost of the power it produces.

The latest findings mean that the costs of delivering Net Zero will increase by hundreds of billions of pounds, and probably by trillions.

Craig Mackinlay MP, the chairman of the parliamentary Net Zero Scrutiny Group, said: 

“It is becoming increasingly obvious that our dash for renewables, notably wind, is failing on the two key criteria of energy security and affordability. An avoidable energy crisis is approaching but sadly our government is yet to recognise it.”

Dr Benny Peiser, Net Zero Watch director said:

“The Climate Change Committee’s Net Zero plan has already been shown to have used wildly optimistic assumptions on the cost of renewable energy. The Norwegian report is another nail in the coffin of its credibility.”

The Climate Change Committee is chaired by Lord Deben, who stood down as chairman of Forewind, the Consortium that is developing the £9 billion Dogger Bank wind farm, when he took on the role of CCC chairman. He was replaced by Charles Hendry, who had previously been a minister in the then Department of Energy and Climate Change (DECC).


In a series of reports and research papers the GWPF and others have been warning for years that the cost of offshore wind projects has remained stubbornly high. Here are some of the key publications: 
[1] Gordon Hughes, Capell Aris and John Constable: Offshore wind strike prices: Behind the headlines. Global Warming Policy Foundation (2017)
[2] Gordon Hughes: Who’s the Patsy? Offshore wind’s high-stake poker game The Global Warming Policy Foundation (2019)
[3] Montford A. Offshore Wind: Cost predictions and cost outcomes. The Global Warming Policy Foundation (2021).

[4] J Aldersey-Williams et al. Better estimates of LCOE from audited accounts – A new methodology with examples from United Kingdom offshore wind and CCGT. Energy Policy 128 (2019) 25–35.

[5] Hughes G. Wind Power Economics: Rhetoric and reality. Vol. I, Wind Power Costs in the United Kingdom Technical report, The Renewable Energy Foundation, 2020.