UK Sustainability Reporting Standards: UK SRS S1 and UK SRS S2

The UK SRS S1 (general sustainability-related financial disclosures) and UK SRS S2 (climate-related disclosures) were published on 25 February 2026 and are the UK‑endorsed versions of ISSB IFRS S1 and S2. The standards are currently not mandatory and are available for voluntary use by any entity that chooses to use them.

During 2026, the UK government and the Financial Conduct Authority will consider whether to introduce requirements for certain (listed and private) UK entities to report against these standards. The FCA is currently consulting on amendments to the UK Listing Rules to align sustainability disclosures with the standards for companies in certain listing categories (set out below). If the proposal goes through, the requirement to align disclosures with the UK SRS would come into force at the beginning of 2027. The consultation closed on 20 March 2026.

The FCA proposes to apply the new sustainability disclosure rules to companies in the following listing categories, with some variation depending on the category:

• commercial companies category (UKLR 6)
• secondary listing category (UKLR 14)
• depositary receipts category (UKLR 15)
• non-equity shares and non-voting equity shares category (UKLR 16)
• transition category (UKLR 22)

At this stage:

• There are no statutory size thresholds (turnover, employees, assets) for UK SRS reporting in legislation.
• For listed companies, scope is proposed to be determined by listing category.
• For private companies, the government has only signalled intent to focus on “economically significant” entities, without defining that term. For additional context, see the Government response to the consultation on UK Sustainability Reporting Standards, and in particular, the summary of responses to Question 13.