P&O Irish Sea

Formed in 1988 by the merger of Pandoro and the Irish Sea operations of P&O European Ferries. Formally named P&O European Ferries (Irish Sea) but traded as P&O Irish Sea. Operations at Fleetwood were sold to Stena Line in 2004 and following the take over of P&O's ferry and port operations by DP World in 2006, the company was absorbed into P&O Ferries in 2010.