For most of her long life, Yoko Ono has been reviled by many rock critics and music fans as the dragon lady who glommed on to a lovesick John Lennon and broke up the Beatles. According to a new biography,

BBC's Tom Brook explores never-before-seen footage and shares his personal connection with the new documentary.

In an interview with Q's Tom Power, author David Sheff explains why he thinks we should be thanking the Japanese artist for keeping the Beatles together longer.