Why are you favouring outpourings from Reach Group newspapers over real fact?
It looks pretty silly repeating the same guff, referring to a nearly 300 year old song and its partial history before it even became the National Anthem.
Look to your history. It is possible to find out what happened in the past, what did not happen in the past, and why things happened. Other countries use the tune that you call "that dirge" too. It is good to know what you're talking about. "Wikipedia" would be a useful place for you to start. Here you are. It's got lots of cross=references too:
https://en.wikipedia.org/wiki/God_Save_the_King
And:
https://www.royal.uk/encyclopedia/national-anthem
Leave the ballcocks to the plumbers.