Rule Britannia does seem unnecessarily imperial. God save the Queen is more dirge like (as is the Australian anthem). Interesting to suggest Blake's song as an anthem though, since it does suggest a certain theocracy.

Truth be told, I didn't hear much else of the Last Night - there being much mirth and merriment going on. (Noted later in the evening: Osymandias taking note of the antics of his future maths lecturer as she sang 'Where's me Jumper' (A classic song I had not hitertofore heard))