We have had several supervisors leave or get promoted recently and I am taking over their role (I thin given what I now do). I am being relied on increasingly for things I’ve not been trained for and am just piecing together. I’m working more shifts than before and get left alone to manage other staff. Would I be within reason to go to management and ask for a promotion? I’d get paid another £2+ p/h and would have more validity when asking staff to do things. Or would it be seen as greedy and self important?