The book's sources are the "New Musical Express" ("NME") chart from November 1952 to March 1960, and the "Record Retailer" (later "Music Week") chart thereafter. It could be said that this division is misleading, since the "Record Retailer" chart was little known until it was adopted by the BBC in 1969 and that by adopting this chart as its standard, the editors had a non-consensual view. An example often given is the case of The Beatles' second single "Please Please Me" which was recognised as a number one hit by every other publicly available chart of the time, but not by "Record Retailer" and therefore not by "British Hit Singles". Other records to which this applies include "19th Nervous Breakdown" by The Rolling Stones, "Stranger on the Shore" by Acker Bilk and the Eurovision Song Contest entry "Are You Sure?" by The Allisons.