yeah... but you don't actually know for sure that they were marking exam papers, your just assuming it!!!
QAA won't listen to you unless you can prove what you saw... but you can't, so i think complaining is essentially pointless
tbh with you, i don't have a lot of faith in essay style questions anyways and don't think it's that the mark scheme is fair, particularly for bio, so i am not too concerned if one marker is marking in a car! it's not that bad now assuming what your saying is true!