If you find it hard to choose between Cunard’s cruise ships , the luxury line may have just the voyage for you. Cunard has launched a collection of back-to-back sailings, The Four Queens Celebration Voyages, that will allow guests to sail on all four of the cruise line’s ships during a 40-night voyage as part of its 2028 programme of sailings. Starting from Southampton on 16 April 2028, guests will embark on Queen Victoria for a 12-night Norwegian fjords sailing. When not exploring ashore, passengers can choose a book from the ship’s two-storey library or enjoy a theatre show. The ship returns to Southampton on 28 April where passengers will move to the iconic Queen Mary 2, featuring the only planetarium at sea, for a four-night western Europe cruise that includes stops in Bruges and Hamburg. Guests can then head for the Baltics aboard Cunard’s newest ship Queen Anne for a 16-night cruise.…