Not a joke as such, but it was very funny. Years ago, I think it was 1985, I was with a mate at Gatwick airport about to go on Hols. We went into quite a big men’s loo which was quite busy but not noisy.
Suddenly there was a loud and long farting noise from one of the cubicles. My friend as quick as a flash shouted “ I’ll name that tune in one”. Everyone in there was laughing.
I think it is reference to Andy (Mountbatten Windsor) “I’m Andy fly me” and his use of the RAF to taxi him around to see the p***file - How dare you.
Could be completely wrong…