My grandfather had a lot of Kipling's Barrack Room Ballads from his time in the army in India. I remember his reciting several from memory, but never singing them. I played him the Bellamy version of Gunga Dun once, explaining the Bellamy Kipling-Folksong Thesis, but he wasn't impressed; less impressed with Mandalay being set to Keep Your Feet Still Geordie Hinny, which he did used to sing.

I reckon Bellamy was forcing a point about the general significance of this - seeing Folk Song as a hermetically sealed genre, as has been The Revival Way for ober 100 years now (but was rarely the case with Traditional Singers). His best settings were when he got rid of actual folk tunes and created his own in The Traditional Idiom.

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I have any amount of old ballad books which freely mix your Childish (or should that be Childlike?) Traditional Ballads and narrative verse by the poets of the time, Kipling included.