UK SRS S2 is proposed to replace TCFD-aligned disclosures for UK listed companies from accounting periods beginning 1 January 2027, building on TCFD's foundational four-pillar structure while introducing detailed requirements that exceed TCFD's principles-based recommendations.
The Task Force on Climate-related Financial Disclosures was created by the Financial Stability Board in 2015 and established the four-pillar structure — governance, strategy, risk management, and metrics and targets.
The TCFD was disbanded on 12 October 2023, with monitoring of climate-related disclosure adoption transferred from the TCFD in 2024 — the Financial Stability Board's own request names the ISSB, while the IFRS Foundation's press release uses both the IFRS Foundation and the ISSB in the same document; primary sources do not agree on a single successor body.
Separately from the Listing Rule TCFD statement discussed on this page, large companies (turnover over £500 million, or over 500 employees) already carry a mandatory climate-related financial disclosure duty under Companies Act 2006 sections 414CA and 414CB, inserted by SI 2022/31. That duty is unaffected by CP26/5's listed-company proposals and does not depend on UK SRS becoming mandatory.
IFRS S2, and therefore UK SRS S2, carries the TCFD four-pillar architecture — the IFRS Foundation's own description is "consistent with", not "fully incorporates" — and then asks for more: industry-based metrics, disclosure of planned use of carbon credits, and financed emissions reporting.
The transition from TCFD to UK SRS represents the evolution from voluntary, principles-based climate disclosure to detailed standards-based reporting under proposed FCA rules.
Companies currently complying with UK TCFD requirements under UK Listing Rules UKLR 6.6.6R(8) must prepare for significantly expanded disclosure obligations.
Framework foundation and expansion
UK SRS S2 adopts TCFD's four-pillar disclosure framework — governance, strategy, risk management, and metrics and targets — but transforms each pillar from high-level recommendations to detailed mandatory requirements with specific disclosure standards.
TCFD's principles-based approach provided flexibility in implementation, allowing companies to tailor disclosures to their circumstances while following broad guidance across the four pillars.
This approach enabled early adoption but created inconsistency in disclosure quality and comparability.
UK SRS S2's standards-based approach prescribes specific disclosure requirements within each pillar, including mandatory quantitative disclosures, prescribed scenario analysis frameworks, and detailed methodology requirements.
UK SRS S2 paragraphs 5-8 establish governance requirements that exceed TCFD's general oversight recommendations.
The UK SRS S2 standard builds directly on IFRS S2, which itself was developed to translate TCFD recommendations into mandatory international standards.
Governance pillar evolution
TCFD governance recommendations (Recommendation A) focused on board oversight and management's role in assessing and managing climate-related risks and opportunities, without prescriptive requirements for governance structures or reporting processes.
UK SRS S2 governance requirements (paragraphs 5-8) mandate specific disclosures including:
- Identity of the body or individual responsible for oversight of sustainability matters
- Processes by which the body ensures appropriate skills and competencies
- How and how frequently the body is informed about sustainability matters
- Whether and how the body considers trade-offs between sustainability and other matters
- How the body monitors and oversees progress against targets
This represents a shift from TCFD's "describe your governance approach" to UK SRS's "disclose specific governance processes and decision-making mechanisms."
Board capability requirements
UK SRS S2 paragraph 6 requires disclosure of how the oversight body ensures appropriate skills and competencies for sustainability matters — a specific requirement absent from TCFD recommendations.
Strategy pillar transformation
TCFD strategy recommendations (Recommendation B) addressed climate-related risks and opportunities in strategy and financial planning, but with limited prescription about scenario analysis methodology or quantitative disclosure requirements.
UK SRS S2 strategy requirements (paragraphs 10-21) establish mandatory disclosures including:
- Climate-related risks and opportunities that could reasonably be expected to affect prospects
- Effects on business model and value chain (paragraph 13)
- Effects on strategy and decision-making (paragraph 14)
- Effects on financial position, performance, and cash flows (paragraph 15)
- Climate resilience analysis using scenario analysis (paragraph 22)
Scenario analysis enhancement
TCFD recommended scenario analysis without prescriptive methodology requirements, suggesting companies use "a range of scenarios" appropriate to their circumstances.
UK SRS S2's resilience provision (paragraph 22) requires an entity to disclose which scenarios it used, its key assumptions and time horizons, using an approach "commensurate with the entity's circumstances":
- Disclosure of whether a scenario aligned with the latest international climate agreement was used — not a mandate that one must be included
- Quantification where the entity's exposure and capability warrant it; qualitative scenario narratives alone can be a sufficient basis (paragraph B15) — quantification is never mandatory
- Specific disclosure of assumptions, uncertainties, and time horizons
- No fixed annual refresh of the underlying scenario work is required, though the resilience assessment itself is updated each period
This transforms scenario analysis from an encouraged best practice to a mandatory exercise with specific disclosure parameters — though not necessarily a quantitative one; qualitative scenario narratives can be a sufficient basis under paragraph B15.
Risk management pillar expansion
TCFD risk management recommendations (Recommendation C) focused on identifying, assessing, and managing climate risks without detailed methodology requirements or integration standards.
UK SRS S2 risk management requirements (paragraphs 19-24) prescribe specific disclosures including:
- Processes to identify, assess, and prioritise climate risks (paragraph 20)
- Processes to monitor climate risks (paragraph 21)
- Integration with overall risk management
- Changes in processes from previous reporting periods (paragraph 24)
The shift from TCFD's general risk management description to UK SRS's detailed process disclosure requirements reflects the move toward comparable, auditable risk management frameworks.
Metrics and targets pillar quantification
TCFD metrics recommendations (Recommendation D) encouraged disclosure of climate-related metrics and targets used to assess risks and opportunities, with guidance rather than requirements for specific metrics.
UK SRS S2 metrics requirements (paragraphs 25-38) establish mandatory quantitative disclosures:
Greenhouse gas emissions (paragraphs 29-31)
- Absolute gross greenhouse gas emissions (Scope 1, Scope 2, Scope 3)
- Scope 3: elective one-year relief for periods beginning in 2027, then comply-or-explain from 2028
- Intensity ratios and methodology disclosure
- Comparative information and significant changes
Cross-industry metrics (paragraph 32)
- Amount and percentage of assets or business activities vulnerable to chronic and acute physical risks
- Amount and percentage aligned with climate-related opportunities
- Capital deployment in climate-related risks and opportunities
- Internal carbon pricing and remuneration policies
Industry-based metrics (paragraph 33)
- Metrics from SASB Standards where applicable to the entity's industry
- Additional industry-specific metrics where material
| Aspect | TCFD | UK SRS S2 |
|---|---|---|
| Legal status | Voluntary recommendations | Proposed mandatory under FCA rules (CP26/5; Policy Statement not yet published) |
| Disclosure approach | Principles-based flexibility | Standards-based prescription |
| Scenario analysis | Encouraged, methodology flexible | Mandatory, specific requirements |
| Scope 3 emissions | Disclosed if material | Elective one-year relief for 2027; comply-or-explain from 2028, permanently |
| Quantitative disclosure | Encouraged | Mandatory with specific metrics |
| Assurance | Not specified | Not mandatory; CP26/5 proposes a statement of whether assurance was obtained |
| Industry guidance | General recommendations | SASB Standards integration |
Scope 3 emissions: from guidance to requirements
TCFD's Annex guidance encouraged Scope 3 disclosure "if appropriate" with limited implementation methodology.
UK SRS S2 establishes comprehensive Scope 3 requirements:
Comply-or-explain from 2028: UK SRS S2 paragraph 29(a) requires Scope 3 emissions disclosure across all 15 GHG Protocol categories where material.
Under the FCA proposals Scope 3 sits on comply-or-explain from accounting periods beginning 1 January 2028, and the draft instrument carries no sunset date, so that is the permanent position rather than a step towards full mandation.
Transition reliefs: FCA CP26/5 chapter 8 proposes elective transitional reliefs — a one-year omission of Scope 3 for periods beginning in 2027 on a simple statement that the disclosures have not been made, a two-year omission of UK SRS S1 non-climate matters, and a one-year relief permitting continued use of a GHG measurement method the entity was already applying. These periods come from the pre-final exposure drafts; the final UK SRS S1 and S2 appendices (¶E3, ¶C4) carry no time limit of their own.
Electing a relief does not engage the proposed "explain" provisions.
Financial institution specifics: UK SRS S2 paragraphs 31-34 establish detailed financed emissions requirements for asset managers, commercial banks, and insurance entities — requirements absent from TCFD guidance.
This represents the most significant expansion from TCFD to UK SRS, transforming value chain emissions from optional to systematically required disclosure.
Assurance and verification differences
TCFD made no specific recommendations about assurance or external verification of climate disclosures, leaving verification as a company choice guided by existing audit and assurance frameworks.
UK SRS does not come with mandatory assurance.
FCA CP26/5 paragraph 7.5 proposes no mandatory assurance requirement; what the consultation proposes is a statement of whether assurance was obtained, plus four particulars where it was — the provider's name, what was assured and to what level, the standards used, and where the report can be found.
The FCA expressly does not require reasons for declining assurance.
The FRC's ISSA (UK) 5000, issued 12 November 2025 and effective for engagements on sustainability information reported for periods beginning on or after 15 December 2026, governs how such an engagement is performed if one is commissioned.
It is for voluntary use and creates no obligation to obtain assurance.
See UK SRS assurance.
Implementation timeline and transition
Companies currently reporting under TCFD face a compressed timeline for UK SRS transition:
2026: Final UK SRS published 25 February; FCA CP26/17 of 5 June proposes removing product-level TCFD reporting for asset managers, life insurers and FCA-regulated pension providers (consultation closed 13 July 2026); FCA Policy Statement on CP26/5 expected autumn 2026 2027: UK SRS S2 proposed mandatory for accounting periods beginning on or after 1 January, excluding Scope 3 2028: Scope 3 comply-or-explain requirements take effect
Gap analysis requirements
The transition requires systematic gap analysis comparing current TCFD disclosures against UK SRS S2 requirements:
Data infrastructure: Scope 3 requirements demand value chain data systems that exceed typical TCFD implementation Scenario analysis: Quantitative resilience analysis requires enhanced modelling capabilities Governance processes: Specific disclosure requirements may require board education and committee structure evolution Internal controls: Standards-based reporting requires more rigorous data validation and review processes
A narrow set of reliefs, not a general grace period
The FCA's proposals do phase parts of the regime — Scope 3 and UK SRS S1 non-climate matters both carry elective transitional reliefs — but everything else in UK SRS S2 would apply in full from accounting periods beginning 1 January 2027, with no general grace period.
What is happening to the rest of the UK's TCFD regime
The FCA's TCFD-aligned Listing Rule disclosures are the part CP26/5 proposes to replace, and they are not the whole of the UK's TCFD architecture.
FCA CP26/17 (Quarterly Consultation No 52), published 5 June 2026, separately proposes removing product-level TCFD reporting for asset managers, life insurers and FCA-regulated pension providers, replacing it with targeted retail and institutional disclosure rules.
The consultation closed on 13 July 2026 and final rules are expected in autumn 2026.
Entity-level TCFD reporting is not changing under that proposal.
Firms in financial services should treat the two consultations as separate workstreams.
Professional guidance and support
The transition from TCFD to UK SRS has generated extensive professional services guidance addressing practical implementation challenges:
Legal framework: Companies Act 2006 section 414CB already imposes mandatory climate-related financial disclosure on large companies; section 414CB(6) separately designates UK SRS S2 as a national reporting framework a company MAY use to satisfy that duty. UK SRS S2 itself is not yet mandatory for anyone, so this is a widening of the routes to compliance, not yet a new mandatory regime in its own right.
Technical implementation: Professional services firms have developed TCFD-to-UK SRS gap analysis methodologies recognising that TCFD implementation experience provides a foundation but not full preparation for UK SRS requirements.
Board readiness: Director education programmes addressing the shift from TCFD's governance oversight recommendations to UK SRS's specific board capability and decision-making disclosure requirements.
The transition represents regulatory maturation of climate disclosure from early-stage voluntary frameworks to comprehensive mandatory standards, requiring systematic preparation rather than incremental enhancement of existing TCFD processes.
For comprehensive implementation guidance covering the transition from TCFD to UK SRS, see UK SRS compliance guide, UK SRS S2, and UK SRS four pillars.