Yeah Veyron haven't set a lap in Dunsfold track! Top Gear just doesn't want that car to pwn every other cars and then future cars won't be able to beat it.
Well, the Stig made the Koenigsegg eat a whole tyre, so I bet the guys at Bugatti thought it would be a bad idea to let them drive the Veyron. It doesn't like eating tyres you see.
It wasn't that the "stig" didn't have downforce, It was because of the setup and the one that ate tyres had a slightly oversterry setup.
Top Gear
A pre-production CCX was featured on the May 7, 2006 episode of BBC motoring programme Top Gear. It was test-driven by Jeremy Clarkson, who praised the car highly but criticised its lack of downforce, which he attributed to the lack of a rear spoiler. He also claimed it was a replacement for smoking, saying it 'is the worlds most expensive nicotine patch'. The first power lap time was 1:20.4 seconds, with The Stig encountering short-shifting problems. Later in the same episode, The Stig lost control of the car during his second attempt to beat the Pagani Zonda F's time (1:18.4 around the Dunsfold Park track); the Stig also went on to suggest that the car would be significantly faster and more stable with a spoiler (according to Clarkson, as the Stig never speaks on camera). Koenigsegg then said that they would put a rear spoiler on the car and bring it back to Top Gear for further testing.
For the May 28, 2006 episode of Top Gear, Koenigsegg had supplied a CCX fitted with a rear wing. The Stig had another attempt, this time setting a new lap record—1:17.6. The carbon-fibre rear wing is available as optional equipment, though it drops the car's top speed to 242 mph from 250 mph.
On the episode of The Stig's crash, Jeremy Clarkson claimed that with the Koenigsegg CCX, he had found a substitute for smoking. He said "Unlike any other supercar [...] this doesn't feel sanitized or tamed". Clarkson continued "It's just completely wild and mad. It's raw, vicious, unbridled power." The Koenigsegg is able to virtually match the performance of the Bugatti Veyron, despite it having approximately 200 bhp less, because it is approximately 700 kg lighter.
In June 2006, Swedish car magazine Bilsport published an on-line article where Koenigsegg press contact Lotta de Salvatore claimed that the improved lap time was not thanks to the rear wing, as the Top Gear presenters claimed. Instead, a better chassis set-up had allowed The Stig to improve the Koenigsegg CCX's lap time by 2.8 seconds.
The reason The Stig went off the first time was that we hadn't had time to set the car up properly, it was oversteering slightly. For the second attempt the CCX had a perfect set-up and better grip. The wing doesn't do any good at the speeds seen on the Top Gear track, only above 300 kph does it start helping. – Lotta de Salvatore, Bilsport
I agree with Niels, I seriously doubt it could be faster round the track than other considerably lighter supercar machinery, and certainly not as fast as other super light road cars (ie. Radicals) that have never had their laps counted on the board.
Appearing on a New Zealand Motorsport television programme called 'Pit Lane' on January 17th 2007, A1GP team manager and British motorsport personality David Sears was questioned if he knew the identity of the Top Gear test driver known only as "The Stig". Without hesitation and in a very matter-of-fact manner he replied, "Oh, you want to know who the Stig is... Ben Collins, he's a British sportscar driver, Ben Collins".
So, they had used him before ... so he probably might be the stig. However, I wouldn't be surprised if they had multiple stigs, for the F1 car it was Hiekki Kolvalinaen (SPtastic), for the MC Hammer it was it's owner (Frank Mountain) ... I wouldn't be surprised if it was one of several ex-BTCC guys floating around.
Remember what JK was quoted as saying when they tried to borrow his Enzo?
"Yeah, you can if you let me borrow your daughter, 'coz it amounts to the same thing", who knows, maybe the Pink Floyd drummer is coming out with a new book soon and he happens to own one.