From 1 January 2027, approximately 500 UK listed companies will be required to report climate risks and opportunities under the UK's new domestic climate disclosure standard.
Published by the in February 2026, UK SRS S2 replaces existing TCFD-aligned disclosure requirements with mandatory quantitative analysis, scenario testing, and full value chain emissions reporting.

What changes from TCFD reporting

UK SRS S2 requires companies to disclose climate-related physical risks, transition risks, and opportunities
that could reasonably affect cash flows, financing, or cost of capital.
The standard must be applied with UK SRS S1 for climate-related matters.

Disclosure framework

UK SRS S2 follows the four-pillar TCFD structure: governance, strategy, risk management, and metrics.
The key upgrade is mandatory quantification of current and anticipated financial effects.

Climate resilience and scenario analysis

Unlike TCFD recommendations, UK SRS S2 makes climate scenario analysis mandatory.
Companies must test their strategy and business model against climate scenarios,
with the analytical sophistication scaled to their climate risk exposure.

Scenario analysis requirements are covered in detail at climate scenario analysis under UK SRS.

Scope 1, 2, and 3 emissions

Companies must report absolute gross emissions across all three scopes using the GHG Protocol.
Scope 3 (value chain) reporting includes transition reliefs. See Scope 3 under UK SRS.

Cross-industry metric categories

Metrics and targets

Six cross-industry metrics are required: transition and physical risk exposure,
climate opportunities, capital deployment, carbon pricing, and executive remuneration linkage.

Financial sector requirements

Banks, asset managers, and insurers must report financed emissions with industry-by-asset-class breakdowns.
UK-specific relief permits different reporting periods where necessary.

Climate-related transition plans

UK SRS S2 does not require an entity to have a climate-related transition plan or to set climate targets aligned with any particular goal. However, where an entity has a transition plan, the standard requires disclosure of specific information about it, including key assumptions used in developing the plan and dependencies on which the plan relies.

Under FCA CP26/5, in-scope listed issuers would be required to state whether and where a transition plan has been published, but not to publish one. The wider question of mandatory transition plan requirements is being considered separately by the Government.

For detailed coverage of transition plan disclosure requirements, see transition plans under UK SRS.

UK-specific amendments

UK SRS S2 is the UK endorsement of IFRS S2 with six categories of UK-specific amendments:

1. No fixed effective date — set by separate UK regulation (FCA Listing Rules for listed companies, Companies Act for others)
2. Removal of delayed reporting transition relief — climate disclosures must be published at the same time as the financial statements
3. Industry classification flexibility — alternative classification systems are permitted for financed emissions; GICS is not mandatory
4. Different reporting period mechanism for financed emissions — financial institutions may report financed emissions for a different reporting period than the financial statements where impracticable to align, with additional disclosures
5. SASB references softened — industry-based metrics are "may refer to" rather than "shall refer to"
6. First-year transition reliefs — no comparative information required in the first year; Scope 3 disclosure deferral available in the first year

Who reports when

Voluntary now: Any UK entity may adopt UK SRS S2 from February 2026.
Mandatory 2027: 500 listed companies under FCA proposals.
Private companies: Consultation expected later in 2026.

See UK SRS timeline for implementation phases.

Transition support

First-year reliefs include no comparative data, alternative GHG methods, and Scope 3 deferral.
FCA proposes additional Scope 3 relief for data infrastructure development.

From TCFD to UK SRS S2

The key upgrades: mandatory quantification, financial statement connectivity,
required scenario analysis, and Scope 3 reporting. See TCFD vs UK SRS.

Implementation — the hardest areas

Based on professional services commentary on early voluntary adoption,
four implementation areas emerge as the most resource-intensive:

1. Scope 3 emissions data along the value chain

Companies typically report 12–18 months of supplier engagement work before full Scope 3 disclosure is achievable.
The CP26/5 comply-or-explain treatment plus first-year deferral provides breathing space,
but data infrastructure work needs to start now.

2. Climate scenario analysis with quantified financial effects

UK SRS S2 requires scenario analysis with rigour commensurate with exposure.
Companies with significant climate exposure can no longer rely on qualitative narrative scenarios —
quantified analysis with explicit assumptions is expected.

3. Connectivity between climate disclosures and financial statements

This demands close coordination between sustainability and finance teams,
with data and assumptions consistent across reports.

4. Financed emissions for financial institutions

Asset managers, banks, and insurers face the most extensive S2 requirements with the financed emissions disclosures.
Industry classification choices and methodology selection materially affect the disclosed figures.

Implementation priorities

Listed companies: Map TCFD disclosures to UK SRS S2, build Scope 3 infrastructure,
upgrade scenario analysis, and establish cross-functional teams.
Financial institutions: Design financed emissions methodology and data systems.
Private companies: Monitor MCR consultation and consider voluntary adoption.

For compliance pathway, see UK SRS compliance guide.

For a compliance pathway aligned to UK SRS S2 specifically, see UK SRS compliance guide and UK SRS reporting guidance.