Hey all

I'm redoing my Single Science this year (in March), but I heard that double award Science is the Single Science and the Additional Science award put together or something... Is it true?
And if so, does the Single Science + Additional = Double Science? Or not? Is it like, a proper Double Science exam or something? So like, would my edexcel certificate say, like, say I get 2 Bs:
Single Science: B
Additional Science: B
Or, Double Science: BB?
Just wondering if it was worth me taking additional Science, or not really!
And also, would I have to redo my Single Science completley to do it? - As I'd be
redoing my Single Science, but
doing the Additional bit if that's correct
Ahh, okay, according to the edexcel site It'd be separate or something from my prior Single Science grade.... meaning I'd essentially have to
do Double Science completley. meaning, I'd have double Science and single science. which is weird/stupid. Couldn't I just take the additional then? Ahhh
Edexcel would be helpful ;P