That's old school thinking right there. Sleepy? Tired? Fatigued? Due to short term sleep loss? Due to interrupted sleep? Due to long term sleep loss? Doesn't matter anymore, what matters is the degree to which your cognitive and physical abilities are effected. The whole ' you're not fatigued you're just tired' mantra is yesterday's thinking. Keep up Twiggy.
Framer
Um, approved UK CAA FRMS, according to BALPA up there leading the way. Its a mixture of all and everything not just what you state.