Remember that tomorrow isn't a bank holiday in Scotland. I'm not completely happy with my offer either, i would have much preferred mixed halls since i seem to get on far better with the opposite sex, but i can't exactly complain about it without sounding like a pervert. And yeah, it's very difficult to justify New Carnegie for how much more it is.
I'm also somewhat confused about their rest of UK accommodation bursary, since i can't find anywhere to apply for it i'm assuming it's something they give you automatically based on data from your student finance application, but how? In one chunk? As a discount of each payment? What?