I'm sure everyone knew this except me, but just in case there's still someone who doesn't here goes.. I was under the impression that any car was tax exempt when it reached 25 years old. I was looking forward to 2006 when my D would be free of tax. Talking to my mate in the pub last night I now find that this benefit was withdrawn and now only applies to pre-73 vehicles. So without that rolling 25-year window a DeLorean will never be free*!