What happened
The incident occurred while the pilot was conducting a solo navigation cross-country exercise originating from RAF Ternhill. During this flight phase, the twin-engine airplane lost control or encountered terrain and impacted the slope of a hill situated near Wildboarclough. The crash resulted in one fatality, as the sole occupant of the aircraft did not survive the impact.
Findings
The source material confirms that the flight was a training exercise involving a solo navigation task. No specific mechanical failures or weather conditions are detailed in the provided text, but the outcome was fatal for the pilot.