Since the HMRC rule changes in April 2022, using the wrong fuel is no longer just an oversight—it’s a legal liability. Use this quick reference to check your eligibility:

🟢 Green Light (Eligible): Agriculture, horticulture, fish farming, forestry, rail transport, non-commercial heating (homes/places of worship), and marine transport (excluding private pleasure craft in Northern Ireland).

🟡 Amber Light (Restricted): Dual-use vehicles (e.g., a tractor used for both farming and snow clearing for a local council). Eligibility depends on the specific primary task.

🔴 Red Light (Ineligible): Construction, road haulage, logistics, manufacturing, airport ground support, and most backup generators for commercial buildings (excluding hospitals).