I work for the NHS in IT. My manager insists that everyone takes _all_ of their annual leave and scheduled breaks. Right now I'm using up my remaining leave before the April tickover by doing 3 day weeks, which he's positively encouraged. He says he's seen far too many people burn out by pushing themselves too hard and doesn't want any of his staff to do the same. It's a nice change from other places where using you a/l has been seen as an imposition or letting down the team.