The UK Trade Remedies Authority published its final determination on 10 September 2026 in its subsidy investigation into imports of hydrotreated vegetable oil (HVO) biodiesel from the USA. The TRA found the imports were subsidised and caused injury to UK industry, and recommended a fixed duty of between £258.10 and £266.68 per tonne.

The TRA assessed whether applying a countervailing amount would be in the UK's economic interests and found it would not be. After considering the recommendation and wider public interest matters, the Secretary of State decided not to apply an anti-subsidy measure, so no anti-subsidy duties will be applied to US HVO imports.

The investigation, launched on 17 March 2025, covers biodiesel obtained from synthesis or hydrotreatment of non-fossil oils and fats, pure or blended, originating in the USA; synthetic paraffinic kerosene is excluded. The UK has a FAME biodiesel industry but no dedicated HVO production. The investigation period was 1 January to 31 December 2024, with an injury period from 1 January 2021 to 31 December 2024.