Ack-Ack,
It is definately not a Spitfire Mk IX.
It is a Spitfire FR.Mk XIVe.
It has a Griffon engine. That makes it a Mk XII, Mk XIV, Mk XVIII, F.21, F.22 or F.24.
It has a five bladded prop. That makes it a Mk XIV, XVIII or F.21.
It has an "e" wing, two 20mm and two .50 cals. That makes it a Mk XIVe or Mk XVIII.
It has a cut down rear fuselage. That makes it a Spitfire FR.Mk XIVe.