The two sisterships Leinster and Munster entered service between Liverpool and Dublin in 1938, the Leinster  having run on the Belfast Steamship route until the new Dublin terminal was completed (the Ulster Monarch was having a lengthy overhaul at the time). They were delivered with buff coloured hulls, which was later replaced with dark green. The ships were the largest in the Coast Lines fleet when delivered, and proved to be too large for the Liverpool-Dublin service for much of the year. They also lacked the ability to carry cattle, a major traffic out of Dublin.

 

The Leinster was refitted in 1946 to become the Ulster Prince. The Ulster Prince, was sold in 1967, being bought later by Epirotiki Lines. She reappeared as the Odysseus. In 1976, Odysseus was used as an accommodation ship at Kyle of Lochalsh, later moving to Glasgow.

 

She was broken up in Faslane in 1980.