Question to the HM Treasury:

To ask the Chancellor of the Exchequer, pursuant to the Answer of 5 February 2026 to Question 109216, what estimate she has made of the annual amount of UK Emissions Trading Scheme revenue generated from domestic maritime emissions allocated to maritime decarbonisation projects by programme.

Domestic maritime emissions will be subject to the UK Emissions Trading Scheme (ETS) from July this year. The OBR’s November 2025 Economic and Fiscal Outlook states that the UK ETS overall raised £3.4bn in 2024-25. Revenues from the scheme are not hypothecated but accrue to the consolidated fund, and support spending on government priorities, which includes maritime decarbonisation.