these night-shifts... there's a point in our shift pattern when we do two day-shifts (saturday, sunday, 0730-2000) then three night-shifts (the monday, so 23.5 hours after the previous day-shift). so the circadian stuff is already royally fucked-up. then on the thursday morning after the third night-shift, I fly to madrid & start my week of daddy-day-care, turning in at about nine or ten after being awake for 30 hours.
a week later, I come back to london & do four night-shifts, then have a couple of days off before the day-shifts start again.
there's an hour+ commute at both ends of the shifts.
so if it's not that, it might be a plane crash or a train crash or maybe just blood in the wrong place in my head. :-(