sentences:  The record did not appear in the book until its eighth edition.Between the 1960s and 1990s the record regularly appeared in the "Guinness Book of Records", initially listed under "Underground Railways – circuit of", but later just under "Railways" and then "Trains".Since the change of publishing style of the book from the 2001 edition onwards, the record – although frequently broken – has only twice appeared in printed form, in the 2008 edition, and then the 2015 edition.