Complex sentence: In 1998 P&O European Ferries merged it's Short sea routes with Stena Line to form P&O Stena Line, as a result of this merger the vessels were again rebranded, this time the vessel was renamed to "P&OSL Picardy".
Split into simpler sentences: In 1998 P&O European Ferries merged its Short sea routes with Stena Line to form P&O Stena Line. As a result of this merger the vessels were again rebranded, this time the vessel was renamed to "P&OSL Picardy".