Question to the Ministry of Defence:

To ask the Secretary of State for Defence, what the readiness days were for the Royal Air Force’s Typhoon fighter jet fleet in each year since 2010.

The answer could only be provided for each individual airframe tail number at disproportionate cost. Readiness Days of individual aircraft or fleets are not a metric the RAF tracks.

The main metric of availability and readiness for RAF aircraft is the number of aircraft in the Forward Fleet each day. This fluctuates daily, as aircraft enter and leave scheduled maintenance, upgrades or storage in the Sustainment Fleet. Consequently, it is usually provided as a spot figure for each Question.