Probably Spitfire XVIe TD248, which was on the gate at Sealand until 1988. It was exchanged for a replica and passed into the hands of Historic Flying, being rebuilt to flying condition, returning to the air in Nov 1992. It is now owned by USA collector Tom Blair but is currently operated out of Duxford, and is will probably be flying at the Flying Legends Airshow at Duxford in 2 few weeks time on the 12th/13th July.
Edit: Too bloody slow I see.........