Taken from a post on another forum......
Jaguars chief architect of the S-Types styling, Simon Butterworth, drew attention to the deliberate use of an elliptical spitfire-wing shape throughout the S-Type. Examples of this elliptical theme can be seen, as mentioned, in the air vents, but also on the inside and outside door handles, the wood door trims, the centre console (although a lot of these were lost in the facelift or series II cars), as well as the shape created by the rear light clusters and the back of the boot lid. Butterworth doesn't say so in the article, but the reason for the Spitfire wing theme being chosen is that the S-Type is built at Castle Bromwich the same factory which turned out the iconic Spitfire fighter of WWII, and these design cues are therefore a tribute to one of Britains most iconic aircraft on one of Britains most iconic motor cars. And what is more emblematic of Britains transport heritage than the Spitfire and the Jaguar? All of which goes to bolsters the S-Types right to claim to represent the best of British. In October 1998, Jaguar produced a numbered limited edition commemorative Book for the S-Types launch. Bound in heavy brushed-aluminium covers, the book includes the story of the Spitfire connection and a picture of the aircraft being built at Castle Bromwich. Its interesting to read this history of the factory where our S-Types are built
http://www.jaguarforum.com/showthread.php?t=5654&highlight=Lofty