Many years ago Mill Hill also covered what is now known as Hang Hill Road. My husband lived as a young boy in a house which had the address of Mill Hill. (now Hang Hill Road)
Mill Hill probably covered an area from Hang Hill Road to the S bend towards Clements End. (Where the old Oakwood Public House commonly called the Mill used to be) An up-to-date map will tell you what area is now Hang Hill Road