I'll ignore your first comment foolish boy :wink:
There's a lot of debate as to whether the UK is a nation. I subscribe to the theory that it is a nation made up of 4 countries.
A national anthem is a tune / song for a NATION. Much as the bullying and corrupt EU thinks it is a nation is isn't and so can't have a national anthem. That said I guess if the EU needs one it should be 'Time to Leave' by Dana.