World War One soldiers in gas masks
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The brothers behind World War One song Pack Up Your Troubles

1 February 2014 Last updated at 11:37 GMT

It started life as a throwaway music hall number but became one of the iconic songs of World War One.

Pack Up Your Troubles In your Old Kit Bag was composed by two brothers from Denbighshire.

But the song was to affect the two men in very different ways, as Carwyn Jones reports.