Written Question·Department for Transport·UIN 16553

Aviation: Alternative Fuels

Tabled: 7 July 2026

Answered: 14 July 2026

Named Day

Question

Greg Smith

To ask the Secretary of State for Transport, whether the price of sustainable aviation fuel since the introduction of the UK Sustainable Aviation Fuel Mandate has met the assumptions used in the Department's published impact assessment.

Answer

Keir Mather

The assumptions used in the Sustainable Aviation Fuel (SAF) Mandate cost-benefit analysis are projections of future SAF production costs over the appraisal period, rather than observed market prices. These estimates are subject to uncertainty regarding fu...

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