Question to the Ministry of Defence:

To ask the Secretary of State for Defence, what the estimated yearly cost to the British Army is of using Sustainable Aviation Fuel in each year (a) since its introduction and (b) for which forecasts are available (i) in total and (ii) by litre; and whether those figures vary from initial estimates.

It is taking time to collate the requested information. I will write to the hon. Member and place a copy of my letter in the Library of the House.