The annual concert is looking dismal without a celebrity. Eddie phones the Duke of Edinburgh and Bill pretends he knows Charlie Williams. Charlie's agent tells him that he is booked in for the concert. The boys, thinking he is an impersonator, coach him on how Charlie acts and speaks. When Eddie insults him, he walks out. The night of the concert there is no Charlie, but Arthur tells Eddie that he turned away a drunk who called himself the Duke of Edinburgh.
—Britstuff