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UK Introduces Mandatory Carbon Reporting for All Listed Companies

The UK government has expanded its carbon reporting requirements, making Scope 3 emissions disclosure mandatory for all companies listed on the London Stock Exchange.

RBN Editorial18 June 2026
UK Introduces Mandatory Carbon Reporting for All Listed Companies

Expanding Transparency

The UK government has announced that all companies listed on the London Stock Exchange will be required to disclose their full Scope 3 emissions — those generated across their entire value chain — starting from the 2027 financial year.

What Is Scope 3?

Scope 3 emissions cover everything a company does not directly control: emissions from its suppliers, the use of its products, and end-of-life disposal. For most companies, Scope 3 accounts for 70-90% of their total carbon footprint, yet it has historically been excluded from mandatory reporting.

The Business Impact

The new requirement will force companies to engage deeply with their supply chains, gathering data from thousands of suppliers. This is expected to accelerate the adoption of supply chain sustainability platforms and create a ripple effect as smaller suppliers are asked to measure and report their own emissions.

Aligning with Global Standards

The UK move aligns with the EU's Corporate Sustainability Reporting Directive (CSRD) and brings British reporting standards in line with the ISSB's global sustainability disclosure framework. Together, these regulations are making carbon transparency a non-negotiable part of corporate life.

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