Tim works for Network Rail. (aka BritRail) He's a signal box man, and he has three possible shifts -
6a-2p
2p-10p
10p-6a
but Sunday's aren't actually part of his weekly schedule,and working on a Sunday gets you time and a half automatically, PLUS extra for working more than 8 hours in one day, so when they asked him to pull a 12-hour shift, he took it. He also gets a shift differential for working the overnight....so....yeah, totally going to take that!
This week he's got two of the overnights, then a half day on Tues (where he gets paid for 8 hours and only works 4. I LOVE unions), and then he's on lates the rest of the week.
I told him when we have babies, he's doing the 4am feeding on the days he has 6a-2p shifts :p.
*Edit*
One of Tim's old boxes:

They closed that one and switched it to a computerized system, but he works both computerized ones and at the actual boxes with the switches.