UK Budget 2026: Is economic reality reshaping the sustainability agenda?

The UK Budget 2026 signals a changing approach to environmental policy. Alexis Ioannidis, Director of Sustainability Services at FRP Advisory, examines five developments affecting decarbonisation, industrial competitiveness and sustainable investment.

The UK Budget, announced on 28 October, presents an interesting picture of the government’s sustainability priorities. While maintaining its commitment to net zero, the government is reducing certain environmental subsidies, prioritising industrial competitiveness and directing investment towards technologies and infrastructure considered economically viable. I believe this is a necessary development. However, there is a difference between making the energy transition more cost-effective and reducing environmental investment to achieve short-term savings.

Five areas deserve particular attention.

1. Hydrogen: the beginning of the end of the hype?

The Budget reduces hydrogen capital grants by £500 million, alongside £200 million in savings from carbon capture funding. It also abandons the proposed Gas Shipper Obligation, shifting hydrogen support towards public funding and more selective investment.

In my opinion, this is heading in the right direction. Hydrogen has long been promoted as a solution for everything from transport to domestic heating. Yet producing, storing and transporting hydrogen involves significant energy losses. Where direct electrification is possible, it is generally more efficient and economical. Hydrogen might have a role in hard-to-abate industries, but public funding should prioritise applications where it offers genuine advantages. The government’s measures to reduce industrial electricity costs could ultimately achieve more by accelerating electrification.

However, reducing Warm Homes Plan capital grants by £1 billion, while protecting most support for low-income households, raises questions. Energy efficiency should be a priority as it is the most effective way to reduce emissions and energy costs.

2. Data centres: can AI growth be environmentally sustainable?

The Budget introduces a Data Centre Covenant, establishing expectations around energy efficiency, water consumption, environmental protection and waste-heat recovery for strategically important developments seeking enhanced government support. This is a welcome step, particularly given the speed at which AI infrastructure is expanding.

According to the International Energy Agency, electricity consumption from AI-focused data centres increased by approximately 50% in 2025, placing growing pressure on energy infrastructure and resources. The government expects new facilities to target a Power Usage Effectiveness (PUE) of 1.3 or better. However, energy efficiency alone does not determine environmental sustainability. Even efficient facilities can consume substantial electricity, while their environmental impact also depends on the energy mix, cooling technologies and local water availability.

The more important question is whether environmental policy and supporting infrastructure can keep pace with technological development. AI offers significant economic opportunities and could itself contribute to improvements in energy efficiency and resource management. However, its rapid expansion requires equally responsive environmental planning and clear standards.

The challenge is not to slow technological progress, but to ensure that the infrastructure supporting it develops in a way that remains consistent with longer-term environmental objectives.

3. Recycling: regulation cannot create a circular economy on its own

The Budget introduces mandatory certification for mechanically recycled plastic used for Plastic Packaging Tax purposes from April 2030, increases Landfill Tax rates and reflects the delay to including energy-from-waste facilities in the UK Emissions Trading Scheme.

These measures complement Extended Producer Responsibility (EPR), which is already influencing packaging costs and material choices. The environmental objectives are reasonable. However, regulation can encourage recycling without making it commercially viable.

Recycling businesses remain exposed to collection costs, energy prices, processing efficiency and demand for recovered materials.Higher landfill charges may encourage waste diversion, but they do not automatically make recycled products competitive with virgin materials.

A functioning circular economy requires viable infrastructure, investment and consistent end-market demand, not simply additional taxation and compliance requirements.

4. Carbon pricing: are the incentives consistent?

The UK Carbon Border Adjustment Mechanism (CBAM) is scheduled to take effect in January 2027, with country-specific default emissions values introduced from 2029.Its objective is to address carbon leakage and protect domestic manufacturers from competition with more carbon-intensive imports.

This is an important principle. Reducing domestic emissions achieves little if production simply shifts overseas. However, carbon pricing must operate alongside policies that make decarbonisation commercially achievable.

The Budget’s industrial electricity cost reductions and Climate Change Levy freeze could strengthen the business case for electrification, while the previously announced removal of Carbon Price Support changes the wider pricing landscape. The question is whether these measures create sufficiently consistent, long-term incentives for investment.

For manufacturers and investors, reliable emissions’ data, affordable energy and access to capital will increasingly determine whether lower-carbon production is competitive.

5. Nature and green investment: where are the priorities?

The government intends to exempt residential brownfield developments of up to 1.5 hectares in England from Biodiversity Net Gain requirements, while extending those requirements to Nationally Significant Infrastructure Projects.

Making environmental obligations proportionate to development scale is reasonable. However, smaller projects can still have significant cumulative biodiversity impacts. Simplifying regulation should not mean overlooking environmental consequences.

The Budget also allocates £2 billion in capital to an Energy Wealth Fund within the National Wealth Fund, supporting renewable and low-carbon infrastructure. This is encouraging, but public investment should be judged by outcomes rather than funding commitments.

The important questions are whether projects deliver additional renewable capacity, measurable emissions reductions and lasting environmental benefits, while attracting sufficient private investment to become financially sustainable.

A more economically disciplined energy transition?

Taken together, these announcements suggest that the UK is increasingly considering the economic realities of environmental policy. This is not necessarily a retreat from sustainability. In many cases, it is a recognition that environmental objectives cannot be achieved without commercially viable technologies, functioning markets and sufficient investment.

However, affordability should not justify weakening environmental commitments without considering the long-term consequences. For businesses and investors, the Budget reinforces the importance of examining the financial assumptions behind decarbonisation strategies, rather than focusing exclusively on environmental targets. For policymakers, the challenge is to ensure that measures supporting competitiveness also deliver genuine environmental progress.

Ultimately, the success of the energy transition should not be measured by the amount of public funding or regulation introduced, but by the environmental improvements achieved and whether they can be sustained economically.

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