When you are of a lower class you tend to be superstitious. For example, because of the little opportunities and low fortune a person of a lower class has they tend to believe in fate and bad luck. This is a dominant theme which is introduced at the beginning of the play and runs throughout it. Mrs Lyons says to Mrs. Johnson, "They say that if either twin learns he was one of a pair they shall both die immediately!" She threatens Mrs. Johnson and plays on her superstitious beliefs by making her believe that if Eddie and Mickey or anyone ever found out the truth, the twins shall both die. This creates good dramatic effect because the audience are shocked that their friendship has now changed and frightening for Mrs Johnson.
Class difference is displayed very clearly in Blood Brothers, in particular the difference in wealth between the two families. Eddie's parents ensure that he has a comfortable upbringing and is able to study at university and receive a qualification, resulting in a highly paid job. This is completely dissimilar to Mickey. He comes from a poor family which meant that he was stuck in a dead end job in a factory. "I bleeding hated it, standing there all day never doing anything apart from putting cardboard boxes together." This reflects Mickey's frustration and highlights the lack of opportunities open to him, which adds to the dramatic effect of the play because it prepares us for trouble in the future.
A good example of dramatic irony in the play is when Eddie and Mickey decide that as they are such good friends they will become blood brothers. "Hey, we were born on the same day. That means we can be blood brothers." The audience knows that they were actually