Conversation so far:
Who handled the mixing for the song Hey Jude?
Scott, Martin and the Beatles mixed the finished recording at Abbey Road.
When was the song mixed?
8 August.
Who is Scott that helped mix the song?
Scott had recently replaced as the Beatles' principal recording engineer.
How did the Beatles respond to the final mix of the song?
Lennon gleefully crowed, 'but I insisted we leave it.
How did Paul McCartney respond to the mix?
CANNOTANSWER.
Were there any big changes made to the music for the mix?
In the song's final bridge section, at 2:58, the spoken phrase "Fucking hell!" appears.
How long did it take to mix the song?
A stereo mix of "Hey Jude" was then completed on 2 August and the mono version on 8 August.

Question: Was there anything in the song that caused a controversy?
Self-contained rewrite: Was there anything in the song Hey Jude that caused a controversy?