There are 4 people in my team who all do the same job over different shifts to cover the working day. However there are only 3 sets of keys (essential for the job). On any given day there will usually be 2 people working opposite shifts. So if you're due in early following a day off who is responsible for getting keys? Is it reasonable to expect someone to come in on a day off (unpaid) to collect keys? It is against company policy for keys to be left on site overnight.