This is product of P51 bashing and represents combat drone similar to MQ-9.
Still dont know in what year would i put it, so its all in the eye of the observer.
The Spitfire 21 was so different from all the Spitfires that came before that it was originally thought it should be named the "Victor." In the end, the Spitfire name was retained.
Based on the experimental Spitfire Mk.IV/XX, the Spitfire 21 f[...]