How does the author use foreshadowing in What the Butler Saw?

In Act I, Scene I, there are two important elements of foreshadowing in this section. The first is the discussion of the Winston Churchill statue as related to Geraldine's birth history, both of which relate to the information revealed at the end of the play. The second is Mrs. Prentice's comment that she feels a mysterious sympathy for Nick, which foreshadows the revelation of exactly who they are to each other, also at the end of the play.