UK SRS S1 and UK SRS S2
What is UK SRS S1? What is UK SRS S2?
Two standards. UK SRS S1 sets the general requirements for sustainability-related financial information; UK SRS S2 covers climate.
Published. Endorsed by the Department for Business and Trade on 25 February 2026 — voluntary today, with no fixed effective date inside the standards themselves.
Proposed mandatory. The FCA’s CP26/5 consultation proposes S2 climate from 1 January 2027 for UK-listed companies, with broader S1 sustainability and Scope 3 emissions on a comply-or-explain basis.
UK SRS S1 and UK SRS S2: The Two Standards
UK SRS S2 and UK SRS S1 provide a comprehensive foundation for UK SRS sustainability reporting, built on proven 1 ISSB baseline with UK-specific enhancements. The framework enables integration with existing UK SRS implementation pathways and aligns with our comprehensive sustainability reporting guidance for systematic market adoption.
UK SRS S1
General Requirements
Establishes the cross-cutting framework for UK SRS S1 sustainability-related financial disclosures following ISSB foundations.
UK SRS S1 requires entities to disclose information about all sustainability-related risks and opportunities that could reasonably affect cash flows, access to finance, or cost of capital through UK SRS S1 comprehensive assessment frameworks.
UK SRS S2
Climate-related Disclosures
UK SRS S2 provides specific requirements for climate-related disclosures using the proven 5 TCFD architecture.
UK SRS S2 follows the four-pillar framework: Governance, Strategy, Risk Management, and Metrics & Targets, with substantially enhanced UK SRS disclosure requirements for comprehensive UK SRS S2 climate reporting.
Listed companies in scope
Proposed mandatory implementation from 2027
UK-specific amendments
Modifications to IFRS baseline standards
TCFD pillars retained
Governance, Strategy, Risk, Metrics & Targets
The TCFD Four Pillars
UK SRS S2 retains the proven TCFD four-pillar disclosure architecture with enhanced UK SRS S2 requirements, but with substantially enhanced requirements within each pillar.
UK SRS S1 and UK SRS S2 implementation builds on existing TCFD market experience while extending disclosure depth and connectivity to financial statements through integrated UK SRS financial reporting.
Governance
Climate oversight, board responsibilities, and management processes for climate-related risks and opportunities.
Strategy
Climate risks and opportunities, business model impacts, and transition planning requirements.
Risk Management
Climate risk identification, assessment, and integration into overall risk management processes.
Metrics & Targets
Scope 1, 2, and 3 emissions disclosure, plus climate-related metrics, targets, and progress reporting.
UK SRS by the numbers
Essential UK SRS S1 and UK SRS S2 statistics and milestones for UK Sustainability Reporting Standards implementation and scope following UK SRS regulatory timeline requirements.
Data reflects current UK SRS S1 market scope, regulatory expectations, and implementation progress across the UK listed company population subject to UK SRS compliance requirements.
UK SRS by the numbers
Essential UK SRS S1 and UK SRS S2 statistics and milestones for UK Sustainability Reporting Standards implementation and scope following UK SRS regulatory timeline requirements.
Data reflects current UK SRS S1 market scope, regulatory expectations, and implementation progress across the UK listed company population subject to UK SRS compliance requirements.
Does UK SRS apply to your organization?
Interactive decision framework to determine UK SRS S1 and UK SRS S2 applicability, scope, and implementation timeline for your organization following systematic UK SRS implementation planning.
UK SRS S1 framework covers listed company requirements, voluntary adoption options, and future scope expansion considerations for comprehensive UK SRS compliance assessment through proven UK SRS S1 and UK SRS S2 implementation pathways.
UK SRS vs TCFD
Detailed comparison showing enhancements, new requirements, and key differences between UK SRS S2 and TCFD recommendations.
Your UK SRS Journey
Strategic regulatory milestones from voluntary adoption to proposed mandatory compliance.
Who Must Comply
UK SRS requirements apply to specific categories based on size, structure, and market presence.
Current Status: Voluntary
Available Now
As of publication, UK SRS S1 and S2 are voluntary for all entities. Any organisation can adopt UK SRS for voluntary sustainability reporting.
Listed Companies
Proposed from 2027
Approximately 500 UK-listed issuers proposed in scope from 1 January 2027, subject to FCA final Policy Statement following CP26/5 consultation.
Large Private Companies
Potential Future
No current proposals for large private company mandatory implementation, but standards designed to accommodate future scope expansion.
Financial Services
Under Consideration
Banks, insurers, and investment firms may face additional requirements through sector-specific regulators beyond FCA scope.
Who Must Comply
Current voluntary adoption path and proposed mandatory compliance timeline for different organization types.
UK-specific Provisions
The UK SRS S1 and UK SRS S2 incorporate six amendments to the 2 ISSB baseline standards, ensuring UK SRS market appropriateness while maintaining international comparability.
These UK SRS S1 modifications support UK SRS assurance requirements and align with 3 government guidance for effective market implementation. For multinational companies, our CSRD vs UK SRS S1 comparison explains key differences with EU requirements.
UK SRS S1 and UK SRS S2 specific provisions reflect consultation feedback from 209 submissions and accommodate existing UK regulatory framework requirements through comprehensive UK SRS consultation analysis.
S1 First-year Relief Removed
No transitional relief for general sustainability topics — immediate application required.
Climate-first Relief Reworked
Modified approach to climate disclosure prioritisation compared to ISSB baseline.
SASB Requirements Softened
"Shall" requirements converted to "may" in certain contexts for proportionate application.
GICS Requirement Removed
No mandatory Global Industry Classification Standard requirement for UK entities.
Additional Technical Changes
Including paragraph B59A addition and other technical amendments for UK market compatibility.
UK Effective Dates
Removal of ISSB effective date references, allowing UK-specific implementation timeline.
UK SRS Implementation Stage-Gate Process
Systematic approach to UK SRS implementation with defined stages, key deliverables, and decision gates for successful regulatory compliance following proven implementation frameworks.
Stage-gate process ensures comprehensive readiness across governance, data systems, analytical capabilities, and disclosure preparation for January 2027 compliance.
Primary References
All information verified against official regulatory and government publications.
UK SRS S1 and S2 — DBT publication
Official UK government publication of the final standards on 25 February 2026.
View PublicationFCA CP26/5
FCA consultation on proposed mandatory implementation for listed companies.
View ConsultationGovernment Response to Consultation
DBT response incorporating 209 consultation submissions.
View ResponsePrimary References
Official guidance, standards documentation, and regulatory sources for UK SRS implementation.
UK SRS S1 and UK SRS S2: Frequently Asked Questions
Essential questions about UK SRS S1 general requirements and UK SRS S2 climate disclosures, covering implementation requirements, mandatory dates, and practical guidance for both standards.
What is UK SRS S1?
UK SRS S1 provides general requirements for disclosure of sustainability-related financial information covering all material sustainability topics except climate (biodiversity, water, workforce, supply chain, human rights, governance, resource use).
It follows single (financial/enterprise-value) materiality on the ISSB/IFRS S1 basis and is proposed for mandatory comply-or-explain application from 1 January 2029.
Explore our <InternalLink href='/uk-srs-s1'>comprehensive UK SRS S1 implementation guide</InternalLink> for detailed requirements.
What is UK SRS S2?
UK SRS S2 covers climate-related disclosures using the four-pillar TCFD architecture (Governance, Strategy, Risk Management, Metrics & Targets).
It's proposed for mandatory application to UK-listed companies from 1 January 2027, with Scope 3 emissions on comply-or-explain from 1 January 2028.
This page provides the complete UK SRS S2 climate reporting guide with all implementation requirements.
How do UK SRS S1 and UK SRS S2 work together?
UK SRS S1 provides the architectural foundation (materiality, connectivity, value chain principles) that UK SRS S2 climate disclosures rely on.
While UK SRS S2 is proposed to apply first (1 January 2027 under FCA CP26/5, subject to the autumn 2026 Policy Statement), UK SRS S1 concepts are essential for proper UK SRS S2 implementation.
Companies cannot apply UK SRS S2 in isolation without understanding UK SRS S1 principles.
Review our <InternalLink href='/uk-srs-timeline-uk-srs-s1-and-s2'>UK SRS S1 and S2 relationship guide</InternalLink> for implementation coordination.
When do UK SRS standards become mandatory?
Under FCA CP26/5 proposals, UK SRS S2 becomes mandatory for in-scope listed companies from 1 January 2027, with Scope 3 emissions on comply-or-explain from 1 January 2028.
UK SRS S1 follows on comply-or-explain from 1 January 2029.
The final Policy Statement is expected mid-2026.
Check our <InternalLink href='/uk-srs-timeline'>UK SRS implementation timeline</InternalLink> for key dates.
Which companies are in scope for UK SRS S1 and UK SRS S2?
Approximately 500 UK-listed companies under UKLR 6, 16, and 22 are proposed for mandatory UK SRS S2 from 2027, followed by UK SRS S1 from 2029.
Private companies remain under review via the Modernising Corporate Reporting (MCR) programme with DBT consultation expected later in 2026.
Any UK entity can voluntarily adopt UK SRS S1 and S2 now.
Use our <InternalLink href='/uk-srs-readiness-assessment'>UK SRS S1 and S2 scope assessment tool</InternalLink> to determine applicability.
What is the UK SRS framework?
The UK SRS framework consists of UK SRS S1 (general sustainability requirements) and UK SRS S2 (climate disclosures), published by the Department for Business and Trade on 25 February 2026.
The framework is based on IFRS S1 and S2 with six UK-specific amendments.
UK SRS S1 and UK SRS S2 work together to provide comprehensive sustainability reporting for UK companies.
View our <InternalLink href='/uk-srs-timeline-uk-srs-s1-and-s2'>complete UK SRS S1 and S2 comparison guide</InternalLink> for detailed implementation requirements.
What are the six UK amendments to IFRS standards in UK SRS S1?
The UK made six key amendments to IFRS S1 for UK SRS S1: (1) UK effective dates replace ISSB references, (2) first-year transitional relief removed, (3) climate-first relief reworked to match UK phasing, (4) SASB 'shall' softened to 'may', (5) GICS classification requirement removed, and (6) connectivity to financial statements clarified for UK context.
These amendments also impact UK SRS S2 implementation.
Review the <CiteRef n='96' href='https://www.gov.uk/guidance/uk-sustainability-reporting-standards' /> DBT government response for detailed amendment explanations.
How do UK SRS standards relate to TCFD?
UK SRS S2 retains the four-pillar TCFD architecture but with enhanced disclosure requirements.
The TCFD framework was formally disbanded in October 2023 and succeeded by ISSB standards which UK SRS adopts.
UK SRS provides more prescriptive requirements than previous TCFD-aligned Listing Rules.
Compare approaches in our <InternalLink href='/tcfd-vs-uk-srs'>TCFD to UK SRS transition guide</InternalLink>.
Is assurance required for UK SRS disclosures?
No mandatory assurance is proposed in the initial phase.
Under FCA CP26/5, in-scope companies must disclose whether they have obtained third-party assurance (disclose-or-explain).
UK practitioners use ISSA (UK) 5000 standards.
The FRC maintains an interim Sustainability Assurance Register launching mid-2026.
Explore <InternalLink href='/sustainability-assurance'>UK SRS assurance requirements</InternalLink> and practitioner guidance.
Can companies early adopt UK SRS voluntarily?
Yes, UK SRS S1 and S2 are available now for voluntary early adoption by any UK entity with all-or-nothing compliance required (no partial adoption).
Early adoption requires a full statement of compliance with the chosen standard(s).
Many companies are using the voluntary period for readiness testing.
Access our <InternalLink href='/uk-srs-compliance-guide'>UK SRS voluntary adoption guide</InternalLink> for implementation steps.
How does UK SRS compare to EU CSRD/ESRS?
UK SRS follows single materiality (investor-focused) while EU CSRD uses double materiality (investor + impact).
UK SRS is based on IFRS S1/S2 with UK amendments, while ESRS uses a broader EU-specific framework.
Both cover climate and broader sustainability topics but with different scopes and requirements.
Compare frameworks in our <InternalLink href='/csrd-vs-uk-srs'>CSRD vs UK SRS detailed analysis</InternalLink>.
What support is available for UK SRS implementation?
The FRC provides guidance and maintains a practitioner assurance register.
Professional bodies including ICAEW, ACCA, and CIMA offer training and resources.
The government published detailed implementation guidance alongside the final standards.
Access our <InternalLink href='/uk-srs-implementation-guide'>comprehensive UK SRS implementation roadmap</InternalLink> with step-by-step guidance and professional resources.