P&O Ferries’ superferry twins, European Highlander and European Causeway which operate between Cairnryan and Larne, have returned to service following a £100,000 refit on each ship. The work, carried out by local ship outfitters Blu Marine, is part of P&O Ferries ongoing £20m investment program across its Irish Sea ships’ and ports. Earlier this year the company relaunched the P&O Express, on its fast ferry service between Troon and Larne, following a £500,000 investment to redesign and refit the ship throughout.