British shopping site GoCarbonFree.com has now given four carbon credits to the Prime Minister's office to offset the emissions of the Jaguar. Brown himself appears to be a typical politician when it comes to making promises. Last year he announced plans to exchange his Vauxhaull Omega for Prius, a commitment that was never fulfilled. Instead once Brown moved into 10 Downing St. he went straight from the Omega to the Jaguar.
[Source: www.gocarbonfree.com, thanks to Jez for the tip]