Yeah the game has a tie in with Top Gear. Even has the the Top Gear test track in it. No idea tho if you get to do an interview with Clarkson after the race tho.
No, what Clarkson does is the "review" of the autovista cars, you win a challenge you get one of his Clarksonisms and he talks about the car and some history. But thats about all he does, but there is another british guy who does all the other narrations