Anthem question

Okay, I haven't googled this (too lazy) but I have a stoopid question. I'm watching the Commonwealth Games on TV and while the coverage is good, CBC is obviously doing this on a shoestring.

Now, at the Olympics, the UK team is the UK team, regardless if they're from Scotland, Wales or England. So when they win (I guess it happens sometimes, LOL) they play 'God Save the Queen'.

But at the Commonwealth Games, if say a Scottish athlete wins gold, what anthem do they play at the medal ceremonies? Same for Wales???