The Walrus also mentioned this one:

From The Long Trail: What the British Soldier Sang and Said in the Great War of 1914-1918 by John Brophy & Eric Partridge (A. Deutsch, 1965), page 57:

WHEN THE STEW IS ON THE TABLE
Tune: "When the Roll Is Called Up Yonder"

When the stew is on the table,
When the stew is on the table,
When the stew is on the table,
When the stew is on the table, I'll be there.

When the beer is in the tankard,
When the beer is in the tankard,
When the beer is in the tankard,
When the beer is in the tankard, I'll be there.