TCFD to UK SRS S2 migration — practical transition checklist
The practical transition guide for UK listed companies preparing to migrate from TCFD-aligned UK Listing Rules toUK SRS S2, which the FCA has proposed for accounting periods beginning on or after 1 January 2027and on which no Policy Statement has yet been published. Disclosure-by-disclosure mapping; where UK SRS S2 asks for more; an 18-month implementation plan; and the assurance-ready evidence file the FRC’s voluntary ISSA (UK) 5000 would expect.
From TCFD to UK SRS S2 in one paragraph
The architecture carries; the substance tightens. Four pillars and 11 disclosures stay; each requirement is significantly raised.
Each TCFD disclosure to UK SRS S2 paragraph
The disclosure-by-disclosure mapping from the IFRS Foundation’s official comparison — how each of TCFD’s 11 recommendations corresponds to UK SRS S2 (which mirrors IFRS S2).
What UK SRS S2 demands beyond TCFD
The architecture carries; the substance tightens. Four areas where UK SRS S2 materially raises the bar.
- 1. Quantitative scenario analysis with financial impactStrat-c uplift
- TCFD allowed narrative scenario analysis describing strategic resilience 4. UK SRS S2 requires quantitative scenario analysis with financial impact assessment 2— modelling revenue, cost, impairment and capex impacts across at least three scenarios (1.5°C, 2°C, 4°C typical). NGFS scenarios are the leading reference. Sectoral translation required.
- 2. Mandatory Scope 3 across material categoriesM&T-b uplift
- TCFD allowed Scope 3 disclosure ‘where appropriate’ 4 — many companies disclosed Categories 1, 6, 7 and 11 only. UK SRS S2 requires all material Scope 3 categories with comply-or-explain relief in year one, per the GHG Protocol Corporate Standard’s 15 Scope 3 categories 5. Categories excluded must be explained.
- 3. Industry-specific metricsM&T-a uplift
- TCFD’s seven cross-industry metric categories carry to UK SRS S2 unchanged 6. UK SRS S2 adds industry-specific metrics — primarily SASB-based. UK SRS S1 ¶¶55(a) and 58(a) soften IFRS S1’s “shall refer to and consider” to “may”, which is a real UK divergence — but ¶59 is a shall: an entity must identify the sources it applied, including the SASB disclosure topics if it used them. Never read that as “SASB is optional under UK SRS” flat 2. Energy companies report flaring intensity; healthcare reports medicine access; financials report financed emissions following PCAF methodology.
- 4. Information connected to the financial statementsCross-cutting uplift
- TCFD encouraged connection between climate disclosures and financial statements. UK SRS S1 requires it under the heading “Connected information” at ¶¶21–24, elaborated at ¶¶B39–B44 — the word “connectivity” appears nowhere in the Standard 2: the same reporting entity, the same reporting period, consistent data and assumptions, and a matching presentation currency. This is the single biggest practical change for many UK preparers.
Six parallel work-streams
From mature TCFD baseline to UK SRS S2-ready reporting. Six work-streams run in parallel; typical 12–18 month duration; quarterly board reviews recommended.
For the full milestone-by-milestone regulatory calendar behind this plan — including the FCA Policy Statement and first-reporting-year dates — see the UK SRS S1 and S2 timeline.
Companies unsure whether they fall in scope should check the UK SRS thresholds guide first.
- FY 2024TCFD baseline (current state)
- FY 2025Migration planning + gap assessment
- FY 2026Parallel work-streams; voluntary early adoption
- FY 2027First UK SRS S2 reporting year
- 2028First UK SRS S2 annual report published; assurance
The four pillars — before and after
Where the uplift sits in each of the four pillars. Governance and Risk Management see incremental changes; Strategy and Metrics & Targets see substantial changes.
- Governance pillar — incremental changeLight uplift
- Same two disclosures (Gov-a board oversight, Gov-b management role). UK SRS S2 2 requires more specificity: named committee, listed skills, frequency, integration into strategy/capex decisions, management-incentive linkage. Most companies with mature TCFD governance can adapt with disclosure-language tightening rather than fundamental governance change.
- Strategy pillar — substantial changeHeavy uplift
- Strat-c scenario analysis is the heaviest uplift in the migration. Move from narrative scenarios to quantitative financial-impact modelling. Typical practice: 3–4 scenarios (1.5°C NGFS Net Zero; 2°C disorderly; 3°C delayed; 4°C hot-house) with sectoral revenue, cost and impairment translation. IPCC AR6 scenarios provide the physical-risk reference framework 7. 6–9 months work for most preparers.
- Risk Management pillar — incremental changeLight uplift
- Same three disclosures (RM-a, RM-b, RM-c) as in the TCFD Recommendations 4. UK SRS S2 requires more specificity on documented methodology, decision tree, and integration with enterprise risk management. Companies with mature TCFD risk processes typically need documentation upgrade rather than process change.
- Metrics & Targets pillar — substantial changeHeavy uplift
- Scope 3 materiality assessment across all 15 GHG Protocol categories 5. Industry-specific metrics (SASB or PCAF). Capital deployment, internal carbon price, climate-linked remuneration disclosed. M&T-c targets must include base year, validation method (SBTi etc.) and performance against target. 6–12 months work depending on Scope 3 maturity.
TCFD to UK SRS migration — frequently asked
What migration involves, timing, mapping cleanly, duration, and the biggest difference.
What does TCFD to UK SRS migration involve?
Three things. (1) Mapping each of your existing 11 TCFD disclosures to the corresponding UK SRS S2 paragraph. (2) Identifying where UK SRS S2 asks for more than TCFD: scenario analysis commensurate with your circumstances (¶22 and ¶B15 — quantification is never mandatory, and a scenario narrative alone can support the resilience assessment), gross Scope 1, 2 and 3 emissions with all 15 Scope 3 categories considered and the included ones disclosed (¶¶29(a), B32 — though ¶C4 lets an entity not disclose Scope 3 at all, with no time limit), industry-specific metrics, and information connected to the financial statements (UK SRS S1’s heading is “Connected information”, ¶¶21–24). (3) Preparing an assurance-ready evidence file: ISSA (UK) 5000 was issued by the FRC on 12 November 2025 for voluntary use, effective for periods beginning on or after 15 December 2026, and is mandatory for nobody.
When do UK listed companies need to migrate from TCFD to UK SRS S2?
For accounting periods beginning on or after 1 January 2027, if the FCA's CP26/5 Policy Statement — aimed at autumn 2026, and not published as at 21 August 2026 — confirms the proposal.
CP26/5 would affect around 600 listed companies: 515 in UKLR categories 6, 16 and 22 would be required to comply, while the remaining 89, listed only in the secondary listing or depositary receipts categories, would instead state which standards they follow.
First UK SRS S2 annual reports arrive through 2028, not 2027.
Do existing TCFD reports map cleanly to UK SRS S2?
The architecture maps cleanly — same four pillars (Governance, Strategy, Risk Management, Metrics & Targets) and same 11 recommendations.
The substance maps less cleanly.
UK SRS S2 tightens most disclosures: governance disclosures name the body and its skills; strategy requires scenario analysis commensurate with the entity's circumstances, which ¶B15 allows to rest on a scenario narrative alone; and metrics require gross Scope 1, 2 and 3, with all fifteen Scope 3 categories considered and the included ones disclosed — subject to ¶C4, which permits an entity not to disclose Scope 3 at all and carries no time limit.
How long does a TCFD to UK SRS S2 migration take?
Typically 12-18 months for companies with mature TCFD reporting in place.
Six work-streams in parallel: (1) governance documentation upgrade; (2) Scope 3 capability build across material categories; (3) quantitative scenario analysis with financial impact modelling; (4) industry-specific metrics development; (5) the processes that connect the sustainability disclosures to the financial statements; (6) assurance-readiness file.
Companies starting in 2025 are well-placed; companies starting in 2026 face catch-up.
What's the biggest difference between TCFD and UK SRS S2?
Three substantive differences, each narrower than usually reported. (1) Scenario analysis: UK SRS S2 ¶22 requires an approach commensurate with the entity's circumstances, and ¶B15 says qualitative information including scenario narratives can alone provide a reasonable and supportable basis — quantification is never mandatory. (2) Scope 3: ¶B32 requires the entity to consider all fifteen categories and disclose which are included, and ¶C4 permits it not to disclose Scope 3 at all, with no time limit; the comply-or-explain framing belongs to the FCA's proposal, not to the Standard. (3) Connection to the financial statements: UK SRS S1 ¶¶21–24, under the heading “Connected information”, require the same reporting entity, the same reporting period and consistent data and assumptions.
Continue across the TCFD + UK SRS guides
From migration, continue to the TCFD framework, UK SRS S2 standard detail, and the broader cluster.
TCFD — the UK guide
Cluster anchor: history, four pillars, UK applicability and the path to UK SRS S2.
FrameworkTCFD framework — 4 pillars + 11 disclosures
Detailed breakdown with mapping to IFRS S2 and UK SRS S2.
StoryTCFD → UK SRS story
The narrative of how TCFD evolved into UK SRS S2.
UK standardUK SRS S1 and S2
The UK’s investor-focused ESG standards.
ReadinessUK SRS readiness assessment
Capability framework for UK SRS implementation.
RegulatorFCA CP26/5
The consultation deleting TCFD-aligned Listing Rules from 2027.
Related guides & references
Primary references
FCA, DBT, IFRS Foundation and TCFD sources anchoring this migration guide.