Question to the Department for Energy Security & Net Zero:

To ask the Secretary of State for Energy Security and Net Zero, pursuant to the Answer of 4 February 2026 to Question 109240, what proportion of the estimated costs of extending the UK Emissions Trading Scheme to domestic maritime are attributable to administrative compliance.

The Impact Assessment estimates £201 million in additional costs over 20 years, with about £179 million, from administrative compliance and around £22 million from emissions reduction investment.

Administrative costs are initially higher because around 2,000 maritime operators enter the scheme in 2026 due to the inclusion of emissions at berth.

The emissions introduced initially are relatively small, and estimates are conservative given overlap with existing UK and EU MRV requirements. On a per operator basis, the admin burden is low. The planned expansion to international maritime is expected to bring far more emissions into scope without increasing administrative burden.