Training does not cease after pilots have completed their formal training but continues throughout their flying career because all operational flying contains an element of training. The information is not held in the format requested; either by the number of training sorties undertaken during basic flying training or by qualified personnel undertaking training on other aircraft types. In addition, flying is not recorded by the number of sorties undertaken by individual pilots. Furthermore, the number of hours flown during basic flying training is not held centrally and could be provided only at disproportionate cost.