Pink Floyd / Beatles style song from Grayson Perry doco
 

Hi all. I heard this Pink Floyd / Beatles sounding piece of music on a BBC Grayson Perry documentary last night.
Shazam was no help to me.

Can anyone please help identify the song?
The URL for the music is:

htt ps://youtu.be/jW4ACackmhY?t=10s

Note: the single space in the 4th character of the above link need to removed.
It seems I can't add a link to this post until I meet a posting quota

Many Thanks,
Ibisman