 When questioned as to why he did the changes, Roy Baker noted that "it was a British film made by British artists for a British audience".In addition to basing the script — both in action and dialogue — on Lord's book, the filmmakers achieved nuanced performances and authentic atmosphere by consulting several actual "Titanic" survivors who served as technical advisors.Among them were Fourth Officer Joseph Boxhall, and passengers Edith Russell and Lawrence Beesley.