Purpose
Summarising the UK Government's release of the first UK Sustainability Reporting Standards, aligned with ISSB, and noting implications for UK businesses, investors, and regulators.
Overview of the announcement
On 25th February 2026, the UK Government has formally announced the launch of the first UK Sustainability Reporting Standards (UK SRS), which are based on International Sustainability Standards Board (ISSB)’s IFRS S1 (general requirements) and IFRS S2 (climate related disclosures). IFRS stands for International Finance Reporting System. The UK SRS represents a substantial step forward in establishing mandatory and globally coordinated sustainability reporting across the UK economy. The UK SRS will underpin future UK sustainability disclosure obligations for companies, facilitating consistency with international reporting standards and integration into financial reporting.
What does the UK SRS include?
The core components include the UK endorsed versions of IFRS S1 and S2, with minimal modifications and clear focus on governance of sustainability and climate risks, overall strategy and resilience, and risk management on material sustainability issues. The UK SRS also puts onus on reporting entities to adopt key metrics and targets (including greenhouse gases or GHG emissions) for tracking and reporting their progress on material sustainability issues.
Key features of UK SRS include:
- Focusing solely on financial materiality, aligning with ISSB standards.
- Begins with climate disclosures (S2), which are likely to be emphasised during initial adoption stages.
- Compatibility with the EU ESRS (although there are differences) and Task Force on Climate-related Financial Disclosures (TCFD).
- Meeting global investor expectations.
Implementation Timeline
The UK Government has signalled a phased approach, with exact timelines to be confirmed through secondary legislation. Indicative expectations are as below:
- For FY 2025–2026, the standards are available for voluntary adoption.
- 2026 onwards: potential mandatory adoption for UK listed companies, large UK private companies and many regulated financial institutions. FCA’s latest consultation paper CP 26/5 open for commentary until March 20th, is seeking to gather industry feedback on replacing TCFD with the UK SRS.
- Expect some transition reliefs that are likely to mirror ISSB’s (e.g., scope three delays, partial disclosures).
Implications for UK Businesses
The UK SRS will help align the UK with global sustainability reporting, reducing fragmentation for multinational businesses. It also strengthens investor expectations for sound climate and sustainability governance.
The UK SRS will support future changes to FCA Listing Rules, BEIS/Companies Act reporting requirements and Prudential Regulation Authority (PRA) expectations for financial institutions.
Operationally, businesses will need to strengthen data systems for climate and sustainability metrics. More importantly, they will need to integrate sustainability risks into enterprise risk management, if not already done, and enhance scenario analysis and transition planning capabilities. Business will also need to prepare for assurance requirements though it is likely going to be some limited assurance initially.
Implications for Investors
The UK SRS is expected to provide greater comparability across UK and global markets, enhanced risk assessment of climate exposed sectors and, in turn, support much discussed capital allocation aligned with transition and resilience.
Relationship to Other Frameworks
The UK SRS now serves as the principal climate disclosure framework in the UK, superseding the TCFD baseline. Developed from ISSB S1/S2 standards with modest adjustments tailored to the UK context, UK SRS offers a robust reporting foundation. The European Union's ESRS differs, primarily due to its adoption of double materiality, though progress towards greater interoperability is evident. While CDP reporting and GRI standards remain optional, they can provide valuable supplementary information alongside UK SRS disclosures.
Key challenges for businesses
The UK SRS has also formalised some of the key challenges already known to the businesses on a sustainability reporting journey. -
- Challenges related to data readiness, particularly on Scope 3 emissions.
- The complexity of scenario analysis for various organisations.
- Requirement for robust cross-functional governance and board-level oversight.
Way forward
The requests for information on sustainability issues from internal and external stakeholders of a business will only grow. Strengthening of data governance and internal controls for sustainability metrics is the key to strong foundations on accurate disclosures on the UK SRS.
The best way forward is to start with a gap analysis against the UK SRS. Most likely, a number of businesses will discover that they are not starting from zero. Mapping existing disclosures like TCFD or SASB to UK SRS requirements could be the next logical step. And lastly, businesses should engage their Boards and audit committee early on, for assurance readiness in relation to disclosures on material sustainability issues as per UK SRS.
