Did this today - partly out of curiosity, partly out of boredom, and partly because I fancied being paid 50p for a blood sample test 
I got 5.94 which they said was quite high but as my HDL reading (good cholesterol) score was 1.97 they said that might account for it.
I eat a lot of rubbish (crisps etc.) but also a lot of good foods (oily fish, veg etc.) so those results were better than I expected.
My glucose reading was good as well which I was surprised by as I am always so grumpy when I'm hungry, I thought I might have a problem with blood sugar levels.