This is one of those tunes which is not quite what you first think it might be.
It’s less than 30 years old and was actually composed by a pair of Germans(!)Ulrich Roever and Michael Korb for a Highland games held in Germany.
Some have suggested it should be the Scottish national anthem and was the Royal Hong Kong Police Anthem’s under British rule (thank you Mr Wiki;)), played when the Union flag was lowered there for the last time in 1997.
Performed here in the Ulster Hall by the Royal Irish Regiment: