In a message to customers, it said: "Hi there, P&O Cruises is part of Carnival Corporation & PLC and as such is unrelated to P&O Ferries." The sacking of hundreds of seafarers by P&O Ferries has led to the suspension of ferry services between the UK and parts of Europe including Ireland. Mark Dickinson of Nautilus International said there are "serious safety concerns" around the decision by P&O Ferries to replace its seafarers with agency workers.