We will not publish a Call for Evidence for the 2025 Annual Tariff Review (ATR). The Review will be informed by the 2025 Biomethane Cost Survey, plus wider market intelligence and evidence gathered through regular stakeholder engagement.

The degression thresholds in the Budget Management guidance have been amended to reflect the new GGSS closure date of 31 March 2028.

New regulations on the Green Gas Support Scheme which come into effect today (4 June) extend the scheme to 31 March 2028 (previously 30 November 2025).

We have published new GGSS budget caps, production factors and inflation forecast effective from 1 April 2024, and made updates to the GGSS budget management guidance.

We have published new GGSS budget caps, production factors and inflation forecast effective from 1 April 2023, and made updates to the GGSS budget management guidance. 

Budget caps (Table 4) and inflation forecasts (Table 3) have been extended to cover scheme financial years 2026/2027 and 2027/2028, following a regulatory amendment (Statutory Instrument 2022 No.592) which took effect on 1 July 2020.

We have improved the explanation of GGSS budget management mechanisms, and added links to the new Green Gas Support Scheme (GGSS): expenditure forecast statements and tariff change notices page (https://www.gov.uk/government/publications/green-gas-support-scheme-ggss-expenditure-forecast-statements-and-tariff-change-notices).

Inflation estimate for financial year 2025 / 2026 added to table 3.

Updated alongside launch of GGSS.

First published.