Beatles songs, Flying

PAUL circa-1994: ''Flying' was an instrumental that we needed for (the film) 'Magical Mystery Tour' so in the studio one night I suggested to the guys that we made something up.
I said, 'We can keep it very, very simple, we can make it a 12-bar blues.
We need a little bit of a theme and a little bit of a backing.' I wrote the melody, otherwise it's just a 12-bar backing thing.
It's played on the mellotron, on a trombone setting.
It's credited to all four (Beatles), which is how you would credit a non-song.'