Greenhouse Gas Emissions Trading Scheme (Amendment) (Extension to Maritime Activities) Order 2026

Debate between Baroness Butler-Sloss and Earl Russell

Thursday 12th March 2026 Lords Chamber

[Earl Russell (LD)]

My Lords, I will respond to this SI and the regret amendment in the name of the noble Lord, Lord Moynihan. My noble friend Lady Suttie will respond to the specific points raised in the fatal amendment tabled by the noble Baroness, Lady Hoey.

This order extends the UK trading scheme to cover emissions from carbon dioxide, methane and nitrous oxide from domestic maritime activities for vessels over 5,000 gross tonnage, including in-port emissions, from 1 July 2026. It implements decisions of the UK ETS authority, agreed by all four Governments of the United Kingdom, and has already passed by a substantial majority in the other place. It is part of our broader strategy to decarbonise all sectors of the UK economy and to meet our legally binding 2050 net-zero targets.

To be clear, we support the order and we will not vote in favour of either the regret amendment or the other amendment. We believe, though, that the SI needs to meet three tests: it needs to have environmental integrity, economic fairness and practical deliverability. It must also support the UK’s wider trading interests, including our growing relationship with the European Union. The Liberal Democrats start from a clear point of principle: carbon must be properly priced and the polluter must pay. The UK ETS is a flagship decarbonisation instrument, a cap and trade system that sets a declining cap on total emissions and auctions allowances, each representing one tonne of CO² equivalent. Tightening that cap over time sends a clear signal to businesses about what they must reduce and by when.

Emissions trading is, in our view, the most effective way to cut total emissions at the lowest cost. It enables the market to identify and invest in the cheapest abatement options, rather than relying solely on prescriptive regulation, and that reduces carbon leakage. Extending the logic to domestic maritime completes a missing piece in the system that already covers power, heavy industry and aviation. Maritime emissions matter. They are a significant and growing source of CO² emissions. A key barrier to their reduction is that fuel prices do not adequately reflect the environmental costs and therefore reduce incentives for change. Including domestic maritime in the ETS helps to remove the barriers, putting a clear technology-neutral price on emissions from voyages and time spent at berth.

The Government’s impact assessment estimates a central net reduction of around 645,000 tonnes of CO² equivalent, delivering greenhouse gas savings valued on the central estimate of around £155 million and around £179 million in air quality benefits. Overall, the measure has a positive net social value on the Government’s central estimate of £132 million. That is a measurable gain for people and planet. Consultation material suggests that vessels over 5,000 gross tonnes account for two-fifths of domestic maritime emissions. Is the Minister confident that the scope and the threshold align with our overall carbon budgets?

Our climate policy must also be fair. Costs must not fall disproportionately on those who are least able to bear them. The Government’s impact assessment suggests limited consumer impact: typically 1% for most goods and around 2% for some—

[Baroness Butler-Sloss (CB)]

I am grateful to the noble Earl, Lord Russell. Can I ask him two things, from a state of ignorance? First, why is Scotland being omitted and Northern Ireland put in? Secondly, we seem to be dealing with an issue on CBAM that was not referred to in the House of Commons. It seems extraordinary that we should be looking at it from a different perspective from the House of Commons.

[Earl Russell (LD)]

I welcome the noble and learned Baroness’s intervention. The Scotland issue relates to devolved legislation and legislation that Scotland has passed. The issue in relation to the CBAM is in relation to—