Java,
Carolyn Grace owns a two seat Spitfire and does "joy" rides for approx £1500 for 20 minutes or thereabouts out of Duxford.
If you do a search on Yahoo with "Carolyn Grace Spitfire" it should bring up her web page.
A good friend of mine has done it and he couldnt stop talking about it.
Before anyone says that its "fraggin expensive" I know it is but Java asked the question!
Cheers
TBL