The quoted legal duty times just go to show how totally out of touch CAP371 is. Plenty of modern and reputable research available but until we have a few more grisly aeroplane crashes nothing much will happen any time soon.
I am very pleased that BA industrial agreements take a slightly more realistic view of fatigue.
As one chief pilot said to me 'If I was a passenger I would like my pilots to be well fed and well rested'. I can reluctantly accept that I am unlikely to die in an air crash due to the slops which pass for crew meals but now that so many of us are bouncing off the legal annual flying hour limits it is hard to make an outsider really understand what it means to be permanently so very, very tired.