This is the legendary Qarry Men song "Just Fun" from the soundcheck performance in Zurich, 2004. It was also played by The Beatles during the "Get Back" sessions The Beatles Just Fun (Lennon/McCartney) (VERSE 1):

We ^Dsaid that our ^Glove was just ^Dfun The ^Dday that our ^Gfriendship be^Dgun well theres ^Gno blue moon that I can see theres ^Gever been in history Be^Dcause our ^Glove was just ^Dfun

(REPEAT VERSE 1) (CODA):

Just ^DFun, Just ^AFun, Just ^DFun... (REPEAT AND END ON A "D")

The Beatles - Just fun