Rapaire's chorus and the first two of the three verses he gives were word for word as sung in Oz in the 60s.

Sorry Les, if I gave you the impression I had ignored the 1941 date but I thought you'd be interested in the possibility of tracking transformations as well as origins and, obviously, didn't make that quite clear.

None of the versions above or in the DT include one from Oz in the early 60s where, before metrication, the standard sized glass for a beer was 7 fl.ozs.

Oh we don't eat trifle 'cos trifle has sherry
and one bit of trifle will make a man merry;
oh can you imagine the day comes to pass
they start serving trifle in a seven ounce glass

There may be others but, it was a long time ago and my books are in storage.

Cheers, Rowan