National Anthem etiquette

[cessna152towser]

In Scotland, nowadays the only time I ever hear God Save the Queen is at the end of the annual Remembrance Day service and then only the first verse, because it is regarded as an English National Anthem. Out of respect though to our common monarch I would always stand to attention during the singing of that verse. Flower of Scotland seems to be unofficially Scotland's anthem though there are other contenders.
I recall standing silent a few years ago while The Star Spangled Banner was sung by a young female soloist at the Ventura Games. The crowd fell silent, some with hands on heart and most stood still though a few continued walking. In contrast when Flower of Scotland followed I was kind of disappointed that everyone started chattering and moving around again.
I've been to renderings of Oh Canada at Canada Day events in London England and at a Scottish Games in Canada and most people stood silent or joined in the singing.

Been to Canada twice and not seen one in the famous uniform!

You would be able to see a few Canadian Mounties in uniform near Canada House in London England on Canada Day.