What is UK SRS? UK Sustainability Reporting Standards explained

Written by: Cameron Wilson, Solutions Manager Reporting | Last updated: 17.08.2026

UK Sustainability Reporting Standards are set to reshape how organisations identify and disclose sustainability-related financial risks and opportunities. Do you know what they mean for your business? When might they become mandatory, and how should you prepare? Continue reading to understand UK SRS S1 and S2 better. This insight outlines the proposed implementation timeline, and shares practical insights from our gap analyses to help you identify your biggest readiness gaps and prioritise the actions that matter most.

What is UK SRS?

UK SRS stands for the UK Sustainability Reporting Standards, the UK’s framework for disclosing sustainability-related financial information to investors, lenders and other creditors. The Government published the final standards on 25 February 2026, adapting the International Sustainability Standards Board’s IFRS S1 and IFRS S2 for the UK with limited amendments.

The UK Sustainability Reporting Standards (UK SRS) comprise two standards. UK SRS S1 sets the general requirements, asking which sustainability issues, from climate through to nature, workforce or supply chains, could affect a company’s cash flows, access to finance or cost of capital. UK SRS S2 applies that discipline to climate specifically. Both are structured around governance, strategy, risk management, and metrics and targets, with disclosures prepared for the same reporting entity, and on the same timetable, as the financial statements. For a fuller comparison, our insight on UK SRS S1 and S2: what businesses need to know, will be published next week.

Almost every gap analysis we complete reaches a similar conclusion. The reporting itself is rarely the biggest challenge. It is everything behind the reporting: who owns the judgements, where the data lives, and whether the assumptions match the plans the business is running on. Cameron Wilson Reporting Solutions Manager, Simply Sustainable

Is UK SRS mandatory?

Not yet. The standards are available for voluntary use, in whole or in part, by any organisation. For listed companies, however, the Financial Conduct Authority has proposed replacing its TCFD-aligned Listing Rules with UK SRS-aligned reporting for accounting periods beginning on or after 1 January 2027, with a Policy Statement expected in autumn 2026. For large private companies and LLPs, existing climate duties under the 2022 Regulations remain in force, UK SRS S2 can be used to meet them, and the Government’s Modernising Corporate Reporting programme will consider whether the standards should enter company law.

The UK SRS timeline: a phased approach

When will UK SRS take effect, and what should organisations prepare for? A clear overview.

30 January 2026 FCA consultation (CP26/5) proposes UK SRS-aligned reporting for in-scope listed issuers.
25 February 2026 Final UK SRS S1 and S2 published for voluntary use.
20 March 2026 FCA consultation closes.
Autumn 2026 FCA Policy Statement expected, confirming final rules for listed companies.
1 January 2027 First accounting periods under the proposed mandatory regime: UK SRS S2 reporting for in-scope listed companies, excluding Scope 3 emissions.
By 6 April 2027 Statutory reviews of the 2022 climate disclosure regulations for large private companies and LLPs. This is a formal moment to extend, simplify or replace the current regime.
2028 periods Scope 3 emissions reporting moves onto a ‘comply or explain’ footing after a one-year deferral.
2029 periods Wider, UK SRS S1 disclosures apply on a ‘comply or explain’ basis after a two-year deferral.

Dates from 1 January 2027 onwards reflect the FCA’s proposals and may change in the final Policy Statement.

What are we seeing from our clients with UK SRS compliance?

Since the standards were published, we have been conducting UK SRS gap analyses that assess readiness against each individual disclosure requirement of S1 and S2. Three findings are consistent across organisations and sectors.

Organisations in scope are closer to UK SRS S2 than they expect. S2 retains the TCFD architecture companies have reported against for years, and in our gap analyses it is common for more than half of S2 disclosure points to be assessed as ready, with governance and risk management frequently above 80 per cent. The remaining gap is concentrated in three areas: quantification of financial effects, formal climate targets and a structured resilience assessment. This mirrors the wider evidence from the FSB and the FRC: the structure is widely in place, and the financial substance is what UK SRS now requires.
Many organisations lack a true financial materiality assessment. Those that have completed a double materiality assessment for CSRD alignment already hold the financial lens UK SRS requires. The common gap sits with older, single-materiality assessments built to shape an ESG report, which do not identify the risks and opportunities attached to each material topic or assess them in financial terms. In our gap analyses, close to half of the disclosure points assessed as not ready trace back to this single root cause, and resolving it closes more of the gap than any other piece of work.
The quantification UK SRS requires often already exists within the business. Listed companies already model severe but plausible scenarios for their viability statements and principal risk assessments, from regulatory fines to supplier failure. That modelling quantifies financial exposure in exactly the way UK SRS contemplates, yet it is rarely connected to sustainability-related risks and opportunities or disclosed. For many organisations, quantification is an exercise in connection rather than creation.

A gap analysis typically produces a long list of findings, but in our experience around 75% can be resolved through three programmes of work:

a financial materiality assessment
the integration of the risk management and governance practices already established for climate risk across the other material topics
quantification of financial effects where practical

None of this is deliverable by a sustainability team working alone. The judgements are financial, the modelling sits with finance and risk, and the disclosures land in the annual report, so it is imperative to engage finance and risk colleagues from the outset rather than at review stage. Doing so can take your organisation beyond compliance by generating new, decision-useful information that can strengthen financial planning and strategic decision-making across the business.

Where does your organisation stand?

Every organisation’s starting point is different, and understanding yours is the first step. We developed a UK SRS readiness check that you will get access to after signing up for our UK SRS webinar. It gives you a rapid view of your key gaps and where to focus first.

Talk to us about UK SRS

Simply Sustainable helps organisations assess UK SRS readiness, build financially grounded materiality processes and connect sustainability reporting with strategic decision-making. You can schedule a free 30 minute introduction meeting with one of our experts to discuss your needs.