UK ETS Extends to Domestic Maritime From 1 July 2026 — Lloyd's Register Issues Compliance Roadmap for Operators

UK shipowners and operators running vessels of 5,000 gross tonnes or above on domestic routes have less than three months to comply with a new carbon cost regime. From 1 July 2026, the UK Emissions Trading Scheme extends to domestic maritime transport, bringing CO₂, methane (CH₄), and nitrous oxide (N₂O) emissions from qualifying ships into the UK carbon market under a legally binding monitoring, reporting, and surrender framework.

The regulation was laid before Parliament under the Greenhouse Gas Emissions Trading Scheme (Amendment) (Extension to Maritime Activities) Order 2026, which came into force in early 2026 and will take operational effect in the second half of the year. Lloyd's Register, one of the primary compliance advisory bodies, has published a detailed briefing outlining what operators need to do before July 1.

The scope of the domestic UK ETS is defined by voyage type and in-port activity. Any ship operating a voyage between two UK ports (excluding Crown Dependencies and British Overseas Territories) falls within the scheme. In-port activities — including hoteling, cargo operations, and all movements within a UK port of call — are also in scope regardless of whether the preceding or subsequent voyage is domestic or international. This last provision has significant practical implications: a vessel on an international voyage that calls at a UK port is liable for its in-port emissions even if it is not running a UK domestic route.

The first reporting period is intentionally short: 1 July to 31 December 2026. From 2027 onwards, the reporting cycle reverts to a full calendar year. Verified emissions reports for the 2026 period must be submitted by 31 March 2027 via the Manage Your UK Emissions Trading Scheme (METS) system. Allowances must be surrendered by 30 April of the year following the reporting period — in practice, 30 April 2027 for the first half-year.

To allow operators adequate preparation time, there is a one-off double surrender deadline for the 2026 and 2027 scheme years, set at 30 April 2028. The verified report deadline for 2026 remains 30 March 2027, so the reporting obligation is not deferred — only the physical allowance surrender has a grace provision.

Each regulated entity must purchase and surrender UK Emissions Allowances (UKAs) equivalent to 100% of emissions from domestic UK voyages and in-port activities, and 50% of emissions from voyages between Northern Ireland and Great Britain. The primary regulated entity is the registered owner unless ISM company delegation is formally agreed in writing and accepted by the relevant regulator.

Regulatory oversight is split across four bodies: the Environment Agency covers England and all non-UK operators; Natural Resources Wales covers Wales; the Scottish Environment Protection Agency covers Scotland; and Northern Ireland falls under the Department of Agriculture, Environment and Rural Affairs.

Exemptions cover expected categories — armed services, law enforcement, search and rescue, fishing, research, and coastguard vessels. Offshore vessels have a transitional exemption through 31 December 2026 only; from 2027 they enter the scheme in full. Scottish ferry services are also exempt under the current order.

The timeline is tight. Any operator performing its first qualifying maritime activity under the new rules must submit an Emissions Monitoring Plan to its relevant regulator within 42 days of that first activity. Given the July 1 start date, operators who have not already initiated the EMP process are behind schedule.

What this means for operators: UK domestic ferry operators, coastal tanker owners, and bulk carriers running inter-UK routes should treat compliance preparation as an immediate operational priority. The METS system registration, EMP development, and emissions data infrastructure all require lead time. Operators who delay until after 1 July will face a compressed 42-day EMP window while simultaneously running their first reporting period. Lloyd's Register's briefing is the clearest available guide to sequencing the compliance workflow.