The British Steel nationalisation was sold to the public as a defence of jobs and strategic capability. Both of those things are true. What was less clearly advertised was the bill.
According to the National Audit Office (NAO), the government spent £377 million keeping British Steel’s Scunthorpe blast furnaces operational in just nine months, between 12 April 2025 and 31 January 2026. Of that, approximately £359 million went directly to British Steel for raw materials, payroll and energy. About £15 million went to external advisers. And there was, at the point the NAO reported, no budget set and no end date for the intervention.
Spending is expected to reach £615 million by June 2026. The government was, in effect, writing a blank cheque to keep two elderly blast furnaces (Bess, dating to 1938, and Anne, to 1954) from going cold.
What the Steel Industry (Special Measures) Act Actually Does
The legal architecture underpinning all of this was assembled at extraordinary speed. The Steel Industry (Special Measures) Act 2025 was introduced, debated and received Royal Assent on a single day: 12 April 2025, a Saturday, after Parliament was recalled from Easter recess in a rare weekend sitting. It was, according to the Lords Library, the only item on the order paper that day.
The powers the Act confers are sweeping. Under section 3, the Secretary of State may ‘do anything for the purpose of securing the continued and safe use of specified assets that the steel undertaking itself could do.’ The government’s own impact assessment describes the emergency powers as ‘not subject to a time limit’ and intended as ‘a last resort.’ The Constitution Society has gone further, describing the powers as ‘virtually unrestrained.’
That is a lot of authority for a measure that was, ostensibly, a stopgap.
The Cost of British Steel Nationalisation
To understand why the government felt it had no choice, the industrial context matters. Scunthorpe employs around 2,700 people and operates the only plant in the UK producing virgin steel, the higher-grade material used for railway lines and structural construction. Network Rail was among the customers whose supply chains would have been disrupted had the furnaces closed. Were the UK to lose this capacity entirely, it would be the only G7 economy without the ability to produce primary steel. The government has described that as a risk to economic security, and it is hard to argue otherwise.
The financial logic on the other side is equally stark. Jingye, the Chinese firm that owned British Steel before nationalisation, had said the Scunthorpe plant was losing around £700,000 a day. The NAO’s own assessment put the government’s ongoing cost at approximately £1.3 million a day once it assumed control. A global steel glut, a 25% US import tariff introduced last March, and higher domestic energy costs than competitor nations all bear on that figure.
What is less forgivable is that the government had already tried to avoid all of this. According to the NAO investigation report, on 24 March 2025 ministers offered Jingye £500 million to support the conversion of the Scunthorpe blast furnaces to electric arc furnaces. Jingye did not accept the offer.
Jingye Wants Paying, and It Has Legal Routes to Try
The relationship has since curdled. Jingye has initiated consultation procedures under the bilateral investment treaty between China and the UK, formally seeking compensation for investment losses, according to BBC News, citing Reuters. The South China Morning Post reports that Jingye claims the UK government was ‘only willing to provide almost zero compensation’ and says it intends to seek to hold the government and British Steel’s management legally liable.
Business Secretary Peter Kyle told the BBC the compensation question would be settled by an independent assessor. His framing of the alternative was blunt: ‘If that business disappears, we will lose the ability for primary steel production in our country, we will become entirely dependent on global supply.’
That is a coherent argument. But coherent arguments and open-ended commitments are different things. The government has bought itself time and legal authority. What it has not bought is a plan. The blast furnaces cannot run indefinitely on public subsidy, and electric arc conversion, the stated long-term direction, requires capital, a willing private partner, or both. Neither is yet in place.
The next test is whether a viable long-term ownership structure emerges before the £615 million projection becomes a floor rather than a ceiling.
