[Revolting cat!]

I was listening to Penny Lane on the radio just yesterday afternoon, and I thought, no way these four musical illiterates had anything to do with this wonderfull arrangement, the trumpet solo, the horns, which all sounded out like they had been written out beforehand and certainly not improvised in the studio by the musicians playing.

[MikeD]

The horn arrangement was done by McCartney & Martin, since McCartney can't read/write music. The picolo trumpet solo was McCartney's idea after watching a performance of Bach's Brandenburg Concertos on the BBC. The actual song (melody, chord sequence, etc.) is McCartney's with a *heavy* Beach Boys/Brian Wilson influence.