Now just one day from The Big Event, the Beatles and EMI threw open the usually closed Abbey Road studio doors to more than a hundred journalists and photographers for a press-call that took up most of the late-morning. Between 2:00 and 4:00 pm there was a BBC camera rehearsal for the Beatles and their 13 plus conductor, and then between 5:00 and 8:00 pm everyone settled down to tape overdubs onto the "All You Need Is Love" rhythm track, made especially important by a new decision to swiftly issue "All You Need Is Love" as a single after the worldwide television boradcast.
Source: The Complete Beatles Chronicle - Mark Lewisohn
