Two RoPax vessels currently running on UK operator Norse Merchant Ferries’ Irish Sea service between Liverpool and Belfast, Lagan Viking and Mersey Viking, are to undergo upgrading work at a yet to be announced shipyard prior to starting operations between Liverpool and Dublin. Both vessels are being replaced on the Liverpool-Belfast run by two chartered 26,500 grt vessels currently under construction at Italy’s Viscentini Shipyard in July and December next year.