Lots of the bawdy trench songs survive in modern use as rugby songs -- talk about a underground folk process ... The Hash House Harriers seem to have picked up a few as well.
If you read the literature of the immediate post-war (WWI) years, you will find references to some of these songs. "The Bells of Hell", based on a child's rhyme, was used in a 1920s novel (I want to say the author was Noel Coward ...).
Cheers,
Brian