All UK helicopters deemed fit for purpose are available for immediate deployment. They are deemed fit for purpose if they are capable of undertaking a specific role identified in a particular theatre on a given day. Helicopters are not available for tasking if they are undergoing scheduled maintenance, modification programmes or any unforeseen rectification work that can arise on a day-to-day basis. A helicopter assessed as not fit-for- purpose may be returned to the front line at very short notice to meet operational demand.
I also refer the hon. Member to my answer of 8 January 2007, Official Report, column 87W, which gives details on forward fleet and average fit-for- purpose figures.