Question: In the United Kingdom, who was the publisher of the book for which Steffan Rhodri played Reg Cattermole in the movie?
Sentence (from "Steffan Rhodri"): Steffan Rhodri (born 1 March 1967) is a Welsh film actor, best known for portraying Dave Coaches on "Gavin & Stacey" and as Reg Cattermole in "Harry Potter and the Deathly Hallows" part I.
Relevant evidence: Yes