It's obviously either something from a production music library or an obscure movie soundtrack - I'll work some people over to try to get this one ID'd I can tell that the music at 20:59 - 22:24 is likely from the same source. Unfortunate that nobody knows what that one is either.
Shazam tagged 27:46 - 28:04 as "Conflict Vs Beauty" by Joseph Saba & Stewart Winter. I can't find it for sale anywhere, but I found a Toyota ad in Norwegian on YouTube with the same music under that name.
27:00 - 27:37 - MechAssault 2: Lone Wolf OST
Was just re-watching this episode tonight and got a strong sense of nostalgia with this section, came here to see what it was only to find out it wasn't listed. So I spent the next 20 minutes agonizing over what it was but then I realized where I had heard it. So I went and found a youtube clip and sure enough (and somewhat unbelievably considering its age) it's a cut from the first level of MechAssault 2's ambient track. At 5:50 in the following video is an example of the part I think they've grabbed, somebody at TG gets a big thumbs up from me for using that one!
Thanks for posting, and nice find! While it was written for that game, it looks like Top Gear licensed the track through DeWolfe Music, it's called "Conspiring" by Michael Cozzi. The original name from the game is "Northwind Ambient" by Michael Cozzi