Brit teenagers have just learned the final grades of their A-level studies (no exams because WuFlu), which are important because it helps determine much of their future prospects of getting a decent job, placement at universities (except as in the post below) and so on.
And then you have Clarkson’s take:
(The “U” basically says, “He did the exam”.)
He left out one detail, however:
The man is a national treasure.