HUNTER DAVIES is the author of the only ever authorised biography of The Beatles, still in print in almost every country in the world. In 2012 he edited The Lennon Letters, published in 20 different foreign countries, and in 2014 The Beatles Lyrics. He wrote the first book about the Quarrymen. Plus forty other non-Beatly books, including novels, biographies, travel and children's books. As a journalist, he has a column in the Sunday Times about money and in the New Statesman about football.

SPENCER LEIGH is the author of 25 books, most of them connected with The Beatles or popular music. He writes music obituaries for the Independent and for 25 years has had his own music programme on BBC Radio Merseyside.

KEITH BADMAN is an author, journalist and film and video archives researcher. He has written or contributed to ten books about popular music, including four on The Beatles, and been a columnist for Record Collector magazine for 20 years. He assisted with the archive film and video research on The Beatles Anthology series.

DAVID BEDFORD is the author of two books about the beginnings and history of The Beatles in Liverpool. He is currently Chairman of the Governors at Dovedale Juniors, the Liverpool school attended by John Lennon and George Harrison.