Yes was written by John Perry. It was recorded by Grapefruit in 1968. It was recorded at Advision Studios in London. Paul McCartney was present at the recording session and helped with producing the recording. Yes was released as the B-side to Grapefruit’s single Elevator in 1968. Grapefruit were signed to The Beatles’ music publishing company Apple Publishing. Elevator was their second single. It failed to chart.