Why cannot the Spitfire be used in TAW LPG campaign?

[KesLenin]

It is available as a choice. But once chosen and it is going through the staring procedure a server message comes up telling me to change it  orI will be kicked. And it does kick . What is going on?

[Thad]

Lenin, would NEVER fly a British fighter. ?

[FTC_DerSheriff]

Because it's in limited supply on the server. You don't have a spitfire in your personal hangar at the start.