National Anthem etiquette

[seanachie]

I really love Hong Kong, and I wanted very badly to be present for the change over but circumstances did not allow. I do remember and always will Chris Patton choosing to have Highland Cathedral played after the Union Jack was lowered. I just watched the video again and still get moved.
https://www.youtube.com/watch?v=zWT6383OxRc

No I am not confused, I do understand it is not the national anthem of the UK or Scotland, but a beautiful and patriotic moment.