The Koenigsegg CCXR Special One was spotted in London as the single exemplar edition hypercar was parked in Lowndes Square and and then took-off on Sloane St offering a nice sound sample of its mean 1200 BHP engine.  
The Koenigsegg CCXR Special One belongs to the Al-Thani family, which is the royal family of Qatar and in the second video you get to see a bit of the interior with the main speed dial and also hear some details with the modifications on this completely customised version.
Watch the Koenigsegg CCXR Special One video after the jump.

Koenigsegg CCXR Special One video :

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Koenigsegg CCXR Special One – on-board footage

Source: YouTube