Question: In the United Kingdom, who was the publisher of the book for which Steffan Rhodri played Reg Cattermole in the movie?
Sentence (from "Harry Potter and the Deathly Hallows"): The novel chronicles the events directly following "Harry Potter and the Half-Blood Prince" (2005), and the final confrontation between the wizards Harry Potter and Lord Voldemort, as well as revealing the previously concealed back story of several main characters.
Relevant evidence: No