She's Leaving Home
The day before McCartney wanted to work on the string arrangement, he learned that George Martin was not available to do the score. He contacted Mike Leander, who did it in Martin's place. It was the first time a Beatle song was not arranged by Martin (and the only time it was done with the Beatles' consent: Phil Spector's orchestration of Let It Be was done without McCartney's knowledge). Martin was hurt by McCartney's actions, but he produced the song and conducted the string section. The harp was played by Sheila Bromberg, the first female musician to appear on a Beatles record.