There are some appalling examples of mismarking and the biggest culprit in my experience is CIE, the only board I am aware of the outsource their exam markers to overseas for English
My son's ums went up 13 marks, grade changed from B to A*
I seem to remember one of the mods children ?moved
whose UMS mark went up a ridiculous amount in an objective subject like maths, how can they get that wrong?
Copies of contested papers should be released free on a teachers request with the mark scheme so teachers can recommend an appeal and remarks should also be free or at the expense of the school( if cleared by the Head)
Parents could still pay for a remark themselves is the school has not recommended it or results were inline with predictions.