Bomber is correct!!
I would go further than suggesting a couple of students on gap year by suggesting this could be made into a formal University research event, properly funded and carried out on the basis of terms of reference created by professional pilots(perhaps BALPA), the CAA, and even contributions by PPRUNE (maybe Dany). If there is a real problem caused by flying hours and/or fatigue it is too important a matter to be aired publically by a TV programme or the press as a result of sensationalism to attract viewers/readers. The results of an entirely independant research would, I am sure, be passed on to the media in a non sensational manner.
OJJ