Do you think maybe the question means that during the play some of the characters are referring to events in British history?
Many of Shakespeare's storylines reach back into British legend (borderline history!). Is something like that going on in Macbeth, do you think?
Here is a thought. One of the greatest works in recent years was War an Peace.
Read that article, think on the Macbeth question as related to War and Peace. Then analyze Macbeth on the same issue of how past events shape the story and characters.