"Elgar's Pomp & Circumstance march used for Land of Hope & Glory, itself sung best (IMO) with the words "Lloyd George knew my father".
Cheers, Rowan <<<<

But that goes even better to Onward Xtn Soldiers by Sullivan!
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The Act III entracte in Bizet's Carmen begins with what sounds like a steal from Moore's The Minstrel Boy To The War Is Gone.
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Peter Bellamy used to assert that, tho the linking narrative of The Transports was set to traditional tunes, all others were his own composition. I pointed out to him the strong similarity of I Once Lived In Service to Fair Maid On The Shore. he said I wasn't the first to have made the point, but he claimed he didn't know, had never heard, FMOTS, & asked me to sing him a verse; after which he admitted he must have heard it somewhere once and retained it in his subconscious, the derivation being so manifest.
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I have remarked elsewhere, on a thread devoted to Tomorrow Belongs To Me in Cabaret & its similarity to The Lorelei, that it is even more like The Rout Of The Blues.

~Michael~