The Window Cleaner by George Formby, Jr. is sung by Avery Bullock in "Failure is not a Factory-Installed Option" after he releases Stan from service when he can't get his head on straight after getting bested by a car salesman and releases a terrorist with money and secrets.
All day up this ladder
'I'm as happy as can be
any thing, thing, thing, anything, the things I shouldn't see
Oh, the blushing bride looks divine
The bride groom, he is doing fine
I'd rather have his job than mine
when I'm cleaning windows
All day up this ladder...