Question to the HM Treasury:

To ask the Chancellor of the Exchequer, what timetable he has set for deciding whether to extend the Carbon Border Adjustment Mechanism to refinery products; and what is the earliest date on which such an extension could take effect.

The Government intends to expand the scope of Carbon Border Adjustment Mechanism (CBAM) to include refinery products, subject to consultation on feasibility and impacts of doing so. This consultation was launched at Budget 2026.

We intend to deliver this measure as soon as is feasible and will set out a timeline in due course.