UK publishes legislation for tougher Iran sanctions

The UK on Sept 8, 2026 published legislation to impose tougher sanctions on Iran, expanding trade restrictions and granting powers to target ships, officials said.

Expanded trade curbs and ship powers

The move tightens the legal tools available to UK authorities and to companies operating under UK jurisdiction. If enforced strictly, the rules could complicate shipping routes and compliance checks for carriers and insurers dealing with vessels tied to Iran, with knock-on effects on freight costs and logistics for some crude and refined products.

The change also raises the prospect of secondary impacts on counterparties that use London-based clearing, trading or insurance services. Financial and shipping firms that handle Iranian-linked business will need updated compliance procedures to avoid penalties, which could alter trading patterns even before any seizures or asset freezes occur.

Watch for implementation details and enforcement guidance over the coming weeks; if ministers publish formal orders by Sept 29, 2026, markets are likely to reprice short-term supply and shipping risk.

Officials said the text broadens existing trade restrictions and gives ministers new authority to act against vessels linked to designated activity. The government described the measures as part of a wider effort to curb Tehran's nuclear programme and other hostile activities, officials said.