Stena Line Holland BV is a subsidiary of Stena Line that operates ferry routes between Harwich and Killingholme on the east coast of England and Hook of Holland and Europort in the Netherlands. The head office is in Hook of Holland in the Netherlands. Apart from during the two world wars there has been a continuous service operating between these two countries, initially by the railway companies serving the east coast of England together with Stoomvaart Maatschappij Zeeland a Dutch ferry company. In 1990 Stena Line had purchased both parts and Stena Line Holland BV came into being.