I don’t condone P&O’s tactics here but aren’t some of P&O’s ships registered in Cyprus, which is part of the EU the last time I looked so I’m not sure if being part of it would have prevented it. I’ll stick my neck out and say that these reported low salaries are commonplace in an international market where employers can bypass national rules. We could all refuse to use companies that pay below UK minimum wage of course, but the other side of the coin is that it provides work, maybe well paid by their country’s standards, for people in poorer parts of the world. In a way, demanding everyone be paid UK minimum wage is the same as saying “Buy British”.