In an old blog post last year, I discussed the names the rUK might adapt after independence:
The United Kingdom of Great Britain and Northern Ireland? It’s really not a good name when one half of Great Britain has just left.
The United Kingdom of England and Northern Ireland? Although Wales was part of England prior to the formation of the Kingdom of Great Britain, I doubt they’d accept this.
The United Kingdom of England, Wales and Northern Ireland? I’d say this is the most likely result.
However, @BrynTeilo then objected to the "United" bit on Twitter a few days ago:
— BT (@BrynTeilo) June 13, 2013
I completely get his point, but what do you do then? If Northern Ireland wasn't part of the new kingdom, I guess the Kingdom of South Britain would be a nifty option, but the Kingdom of South Britain and Northern Ireland doesn't exactly roll off the tongue.
Perhaps they'll just go for brevity and call themselves the Kingdom of Britain, but I guess the most likely solution will be the Kingdom of England, Wales and Northern Ireland, even though it sounds a bit odd without the "United" bit.
I just wonder what the demonym will be -- Kewnian?