@MarchingFrogs many thanks, I think it's going to be very difficult for anyone to appeal under that criteria particularly as it has to go through the school first. I think I'm most frustrated that they have used this as a reason without actually telling me that there was lack of evidence as ds could have rectified this, apparently it was listed on a report that was never sent out, so perhaps that's an angle I can take. At the end of the day, and I know plenty will say oh well, he obviously didn't do the work, A levels are normally based on final exams and coursework, not whether you hand your homework in on time, which is what makes the evidence approach flawed. DS completed all the coursework, it was in on time, there is a substantial amount of it due to the subjects he took, he was told to solely focus on the coursework, yet they then use 'lack of evidence' as the reason for a D grade when he was predicted an A or minimum a B just a few months before.