I thought this was an interesting post on Ofqual about mainly Eng Lit issues :
Posted on 25 May 2018
How are papers graded/standardised in, say GCSE English Lit if some students study certain texts and their choice of question/s are believed to be easier/harder than the question/s others had to answer? Making particular reference to the AQA English Lit paper taken today where one question on poetry was taken directly from the sample paper published a few years ago - many teachers would have analysed this sample question extensively with their students already.
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Comment by Ofqual posted on 28 May 2018
We are aware that a question in AQA's English literature exam paper was very similar to one in an earlier specimen paper. This is unusual and inappropriate. We will closely monitor AQA’s plans for awarding this qualification; we will want to be sure that all students are treated as fairly as possible, whichever option they have taken.