I'm contracted to work 37 hours a week, but thats devided by the hours I work in a year, and the number of weeks. In reality, depending on what week it is in my shift pattern, I can work anywhere from 24 hours a week, when I work Wednesday and Thursday 12 hours each, to 60 hours when I work Monday (day), Tuesday (day), Friday (night), Saturday (night) and Sunday (night). This also doesn't take into account OT, where I can do upto an extra 50 hours a month sometimes depending on staff levels.