Jaguar x-Type on a 54 plate , Its my fathers car as he was traveling down the motorway the vehicle lost all power he pulled over and tried restarting but there are no dash lights coming on and engine wont crank over ,but there is power as the hazards ,central locking , electric seats and headlamps work but there is no power when turning on the ignition.

Any idea's to whats wrong ?

Thanks in advance

Mat