UK SRS S1 Timeline: 2026 Publication, Proposed 2027 Rules and What Companies Should Do Now

The most important completed event is the publication of final UK SRS S1 and S2. This created an authoritative UK reporting basis for voluntary use. It did not itself determine which entities must report.

UK SRS S1 contains the general architecture:

objective and primary-user focus;

identification of sustainability-related risks and opportunities;

investor-focused materiality;

reporting entity and connected information;

governance, strategy, risk management, and metrics and targets;

sources of guidance;

location and timing;

comparatives and compliance;

judgements, measurement uncertainty and errors; and

application and transition provisions.

A voluntary reporter can choose its first reporting period, but it cannot selectively ignore requirements while making a compliance claim. The same-time reporting requirement in paragraph 64 applies because the first-year delayed-publication relief in IFRS S1 was removed from UK SRS S1.

During 2026, companies need to distinguish the new voluntary standard from existing requirements.

Listed issuers within the current UKLR climate framework continue to apply the FCA's TCFD-aligned rules for the relevant accounting period. Specified large companies and LLPs continue to apply the 2022 climate-related financial disclosure regulations. Sector-specific and pension reporting duties may also apply.

The publication of UK SRS does not suspend or replace those obligations automatically. The practical response is a controlled bridge:

1. map current TCFD or company-law disclosures to UK SRS S1 and S2;

2. identify new requirements, especially non-climate S1, financial effects, industry information, controls and compliance statements;

3. retain the current legal reporting basis until the applicable rule changes; and

4. design data and governance processes that can support both current and future reporting during the transition.

The FCA states that it intends to publish a Policy Statement in autumn 2026. This is the highest-priority regulatory trigger for listed-company planning.

When the Policy Statement appears, the implementation team should update at least the following within a defined review window:

final in-scope listing categories;

mandatory, comply-or-explain and excluded elements;

the treatment of UK SRS S1 non-climate reporting;

the treatment of Scope 3 under UK SRS S2;

final transition relief durations and eligibility;

report location and cross-reference rules;

explanation wording and identification of non-complied paragraphs;

transition-plan and assurance transparency requirements;

commencement and accounting-period application dates;

current-rule run-off arrangements; and

interaction with UK SRS compliance statements.

The update should be completed through a controlled change log, not by editing the annual-report draft informally.

CP26/5 proposes rules coming into force on 1 January 2027 and applying to accounting periods beginning on or after that date. The distinction between rule commencement, reporting-period start and publication date matters.

A company with a 31 December year-end would enter the proposed regime for the year beginning 1 January 2027. Its first annual report under the new rules would normally be published in 2028.

A company whose accounting period begins on 1 April 2027 would also be in the first proposed cohort. Its first report under the new rules would normally appear in 2028.

Under the consultation's transition proposal, an issuer with a period beginning before 1 January 2027 could continue applying the existing TCFD-aligned rules, or voluntarily apply the proposed new UK SRS rule. The exact option must be checked against the final Handbook.

The project deadline is therefore not the publication date of the annual report. Materiality, value-chain work, data design, controls and board oversight need to operate during or before the reporting period.

The final UK SRS S1 climate-only provision has no fixed period in the standard itself. When application is mandatory, its availability is subject to the FCA, Companies Act or another competent UK authority.

CP26/5 proposed using that provision to permit a two-year deferral of non-climate S1 reporting for the first FCA cohort:

A company using the climate-only provision cannot assert UK SRS S1 compliance. It must disclose use of the provision. This claim consequence remains relevant even if the regulator allows the deferral.

The government's future work for economically significant non-listed entities sits within the Modernising Corporate Reporting programme. The policy direction is to consider the role of UK SRS alongside simplification of the annual report and existing non-financial reporting requirements.

The key point for timeline planning is that no complete company-law timetable has been finalised. A future process would normally require consultation, policy response, legislation or regulations, implementation guidance and transition arrangements.

Private and unlisted groups should maintain separate update triggers for:

publication of the Modernising Corporate Reporting consultation;

definition of economically significant entities;

scope thresholds and group exemptions;

strategic-report or other location requirements;

relationship with current climate disclosures, SECR and the non-financial and sustainability information statement;

assurance expectations;

commencement and transition periods; and

treatment of voluntary reports prepared before the law changes.

Create a one-page regulatory map identifying current duties, voluntary choices, CP26/5 exposure, possible Companies Act exposure, sector rules and contractual requests. Assign an owner and review date to each item.

Confirm the financial-statement reporting entity, reporting period, authorisation timetable and intended location. Identify whether current sustainability reporting has a different boundary or publication date.

Expand beyond climate. Use business-model, value-chain, dependency, impact, risk-management, strategic and external data to identify sustainability-related risks and opportunities affecting prospects.

Document primary-user decisions, nature and magnitude, timing, likelihood, concentrations, financial effects and qualitative factors. Link each material matter to revenue, costs, assets, liabilities, cash flows, financing or capital allocation where applicable.

For each material matter, map governance, strategy, risk management, metrics and targets. Identify the dedicated S2 requirements for climate and entity-specific requirements for other topics.

Build a data dictionary, evidence register, methodology controls, reconciliations, review workflow and issue-management process. Align key deadlines with the financial close.

Pre-agree the hierarchy of possible statements: full S1 compliance, S2 compliance with disclosed reliefs, regulatory comply-or-explain reporting, partial alignment or voluntary use without a compliance claim. Obtain legal and technical review before final approval.