All installation operators within scope of the UK Emissions Trading Scheme (UK ETS) are required to submit data to their regulator between 1 April to 30 June 2025, ahead of the next allocation period.

The baselineBaseline dataData collectionCollection is an essential part of the free allocation application, and failure to submit this report by the deadline will result in an operator not receiving free allocation at any point in the 2027-2030 period, and in some cases, in 2026.

This data collection period is also the application window for free allocation and for hospital or small emitter (HSE) and ultra-small emitter (USE) status.

Applicants for HSE or USE status must submit all data required to apply to join these lists for the 2026-2030 period between 1 April to 30 June 2025, for the 2026-2030 period..

Template and guidance

The Baseline Data Report (BDR) template is for use by all operators:

• to meet their submission requirements
• apply to acquire USE/HSE status
• and/or to apply to receive FA

The following guidance is for operators of installations within the current scope of the UK EmissionsETS:

• UKETS12 Tradingguidance Schemeexplains (UKhow ETS):operators should report their data using the BDR template during the 1 April to 30 June 2025 collection window

There are other supplementary guidance documents for operators explaining the different elements of free allocation applications and calculations:

• UKETS12 guidanceUKETS11 explains how the allocation methodology is applied at the installation level, including the impact of the provisions designed to reportaddress the requiredexposure datato a significant risk of carbon leakage. It describes the different types of sub-installation defined in the methodology and the approach for determining the allocation for each one
• UKETS13 guidance explains the requirements for monitoring and reporting all data required for the free allocation of UK allowances and the Baseline Data Collection,Collection
• UKETS14 andprovides howguidance on the verification of data relevant to updatethe benchmarkfree valuesallocation of allowances (baseline data and activity level data) as well as the accreditation of verifiers that conduct verification activities under the UK ETS.

These guidance documents are subject to review following the outcome of the Free Allocation Review.