Many airlines have a bottle to throttle rule of 12 hours these days, not unreasonable, but these same airlines often have no restrictions on early starts late finish, so day one you report at 04:00am so thar means for most up at 3am or earlier, which means your drinks curfew starts a 3pm the day before....late Sunday lunch anyone.
What I’d love to see is a blanket test at say EDI or MAN of everyone from cabin crew to security tested for drugs and alcohol use, on the other hand maybe best we don’t