CCUS Role in UK Net-Zero Compliance Frameworks – Detailed Explanation With Case Laws

1. Meaning and Importance

Carbon Capture, Utilisation and Storage (CCUS) has an important role in the United Kingdom's legal framework for achieving net-zero greenhouse-gas emissions. CCUS involves capturing CO₂ from industrial facilities, power generation or other sources, transporting it through pipelines or other systems, and permanently storing it underground or using it in industrial processes.

The UK does not treat CCUS as a replacement for all emissions reduction. Instead, it is incorporated into a wider framework of carbon budgets, emissions regulation, energy policy, environmental assessment and industrial decarbonisation.

The government's current policy identifies CCUS as an important contributor to the UK's Net Zero strategy, including industrial carbon capture, power CCUS, greenhouse-gas removals and transport and storage infrastructure. (GOV.UK)

2. Climate Change Act 2008

The main legal foundation is the Climate Change Act 2008. The Act created legally binding carbon budgets and established the framework for reducing UK greenhouse-gas emissions. The statutory 2050 target was subsequently amended to require at least a 100% reduction in net greenhouse-gas emissions compared with 1990 levels. (GOV.UK)

CCUS contributes to this framework in two principal ways:

Reducing emissions from difficult-to-decarbonise activities, such as cement, steel and chemical production.

Supporting greenhouse-gas removals, where CO₂ is captured from biological or other sources and permanently stored.

Thus, CCUS can help regulated sectors reduce their contribution to the UK's carbon-budget pathway.

3. CCUS and Industrial Compliance

Some industrial processes cannot easily eliminate all CO₂ emissions through electrification or renewable energy. Cement production is a good example because some emissions arise from the chemical process itself.

CCUS provides a method for capturing these emissions before they reach the atmosphere.

The UK has developed an Industrial Carbon Capture Business Model, alongside business models for transport and storage and power CCUS. Government materials explain that these mechanisms are designed to attract private investment and provide longer-term revenue certainty. (GOV.UK)

Therefore, CCUS is connected to compliance in two ways:

regulatory carbon constraints → need for emissions reduction → CCUS investment → verified capture/storage → lower net emissions.

4. Energy Act 2023 and Economic Regulation

The Energy Act 2023 provides an important legal foundation for the UK's CCUS framework. It establishes economic regulation for CO₂ transport and storage and gives Ofgem regulatory responsibilities in this area.

The government explains that transport and storage networks are likely initially to operate as regional natural monopolies. Economic regulation is therefore intended to address issues such as monopolistic pricing and provide investment certainty. (GOV.UK)

This is significant because a CCUS system cannot function merely through individual capture plants. It requires common infrastructure connecting multiple industrial emitters to storage sites.

5. UK Emissions Trading Scheme

The UK Emissions Trading Scheme (UK ETS) is another important component.

The basic principle is that regulated installations face an economic consequence for covered greenhouse-gas emissions. Properly captured and permanently stored CO₂ can therefore have compliance value under applicable emissions-accounting rules.

The current UK energy policy framework identifies the UK ETS alongside other measures such as Carbon Price Support and the Emissions Performance Standard as tools supporting power-sector decarbonisation. (GOV.UK)

CCUS therefore operates within a broader carbon-pricing environment, rather than as an isolated technology programme.

6. Cluster-Based Regulation

The UK has adopted a cluster approach to CCUS.

Under this model, several industrial emitters can connect to a common transport and storage network:

Industrial emitters → capture facilities → CO₂ transport network → storage hub → geological storage.

This approach reduces the need for every industrial facility to construct its own independent storage system.

The government's CCUS framework includes cluster sequencing and separate regulatory and commercial arrangements for industrial capture, power, transport and storage. (GOV.UK)

7. Environmental Assessment and the Finch Case

A crucial legal issue is whether climate effects must be considered when authorities approve projects.

In R (Finch) v Surrey County Council [2024] UKSC 20, the UK Supreme Court held that, under the applicable environmental-impact-assessment framework, the environmental assessment for the oil-extraction project had to consider downstream greenhouse-gas emissions from the eventual use of the extracted oil. (Supreme Court)

The case is important for CCUS because it demonstrates that climate impacts can be legally relevant to project-level environmental decision-making.

For a CCUS project, regulators therefore need to consider both the project's direct environmental impacts and the wider climate context where required by the applicable legal framework.

8. Heathrow and Climate Commitments

In R (Friends of the Earth Ltd) v Heathrow Airport Ltd [2020] UKSC 52, the Supreme Court considered whether the government's Paris Agreement commitments were relevant to the designation of the Airports National Policy Statement. The Court recognised the legal relevance of the UK's international climate commitments within the statutory planning framework. (Supreme Court)

The case is relevant by analogy because major CCUS infrastructure is also likely to require planning and environmental decisions that interact with national climate policy.

9. Compliance, Monitoring and Verification

CCUS cannot contribute reliably to net-zero compliance unless the amount of CO₂ captured and permanently stored can be demonstrated.

Therefore, the legal framework needs:

accurate measurement;

emissions reporting;

independent verification;

storage monitoring;

leakage detection;

record keeping; and

enforcement for inaccurate reporting.

This prevents companies from claiming climate benefits for CO₂ that has not actually been captured or permanently stored.

10. Long-Term Legal Responsibility

Another important issue is long-term liability.

A CCUS operator may have obligations concerning:

safe transportation;

geological storage;

monitoring;

leakage;

remediation;

financial security; and

post-closure responsibilities.

The UK's developing transport-and-storage regulatory system is designed to create a structured framework around these activities rather than leaving them entirely to private contracts. (GOV.UK)

Conclusion

CCUS has a significant role in the UK's Net Zero compliance framework, particularly for industrial sectors where complete elimination of emissions is technically difficult. Its role is supported by the Climate Change Act 2008, carbon budgets, the UK ETS, the Energy Act 2023, environmental-assessment law and specialised CCUS business models. (GOV.UK)

The legal structure can be understood as:

Legally binding carbon budgets → emissions regulation → industrial decarbonisation → CCUS capture → regulated transport and storage → monitoring and verification → contribution to net-zero compliance.

The Finch and Heathrow cases demonstrate important principles concerning climate impacts and the relationship between major infrastructure decisions and the UK's climate commitments. They are not CCUS-specific cases, but they provide useful judicial guidance for understanding how climate considerations interact with infrastructure regulation.

Ultimately, the UK approach treats CCUS as part of a wider regulated net-zero transition, combining technological deployment, economic regulation, carbon pricing, environmental assessment and long-term monitoring.