I did some research
Since "Top Gear"'s relaunch in 2002 with Clarkson, May and the Hamster there have been two "Stigs". The first Stig wore a black racing suit and was known as "Black Stig". This Stig was played by F1 driver Perry McCarthy, who revealed his identity in his book "Flat Out, Flat Broke" and was then subsequently "killed off" at the start of series three when he was seen to drive very fast off the flight deck of an aircraft carrier and not stop in time. Whether the two events are connected is unknown, but it is quite likely that the Top Gear producers were not happy at his revelation.
From this point onwards the new Stig wore white duds and was known as "White Stig". It is the identity of this newer Stig that remains shrouded in mystery. Many people believe that "White Stig" is not one particular F1 test driver but several, depending on who is available on any given day for filming. This theory is given added weight by the recent Winter Olympics special when the driver performing the ski-jump stunt, ostensibly "The Stig" was later revealed by local Swedish newspapers to be a local snowmobile cross driver. Various F1 drivers have appeared on the show in the "star in a reasonably priced car" segment, and all have denied being the Stig or evaded the question such as Damon Hill. The current theory as espoused by "Daily Express" is that F1 driver Julian Bailey is the Stig, but no-one really knows. That's the whole point!
The Stig's name derives from presenter Jeremy Clarkson's days at Repton School; where, according to Clarkson, new students were always called "Stig". A proposed name for the Stig was originally "The Gimp" until protests from Perry McCarthy nixed the idea. There have been two official Stigs on the show, while various other Stigs have made cameo appearances for particular episodes
Lol "wake the gimp to drive the Bugatti Veyron"..."but he's sleeping"...."wake the gimp!"