Bless 'Em All is famous as a patriotic song popularized during WWII, although its origins are much earlier
and rather murky. We hate to refer anyone to horrid Wikipedia for anything, and anything there should be taken
with a trainload of salt, but they have a decent account of the song's history here:
https://en.wikipedia.org/wiki/Bless_%27Em_All
A better account of it here:
http://www.bowersflybaby.com/stories...1_lillies.html
The song lends itself well to parody and alternate versions of the lyrics (several of them "NSFW"), especially
as a soldier's or aviator's complaint about superior officers (it may have even begun that way), and the version
from the dinner programme has substituted the names of players serving in combat as new lyrics honoring
those guys.
The most popular "standard" version was recorded by the great Vera Lynn and can be heard here:
https://www.youtube.com/watch?v=xf4jhb9p2v8
Since the song was hugely popular during the war and everyone knew the melody well, it was clearly
included at the dinner as a sing-along.