Ds2 did one GSCE this year - they take RE a year early. To his surprise and delight he received a B when he was expecting a pass. To our further surprise he was one UMS mark off an A, which is only half a raw mark (I think - may have got it the wrong way round). So we went for a remark, at his request. He said he would almost relieved if he went down a few marks and didn't feel he had missed out on a A by a hairsbreadth. Ds2 has ASD and terrible at writing - he has a scribe so that's why it is so amazing he has turned out to be good at dictating his thoughts.
I went through this with two GSCEs last year with my year 11 and there was only a tiny change in one of his remarked papers (and the bad grades didn't change), so I am really not expecting anything, but just in case there is anyone out there waiting for an remark. Ds2 is Edexcel....