What grade is this A-level english language coursework?

I would have isssue with the idea of a 'Dailymail' style piece as I would expect it to be reactionary if not rabidly right wing. 'Pop Princess' would read as high maintenance diva to most people - is this really a positive term as you suggest. That said it could benefit from a little editing to avoid repetition - there are other aspects of bias than simply negartive and positive. But overall certainly better than an E..