I'm English

Or preferable because your other nationality is very near the top of the list!

So what happens if you have to give 'country of birth' but you have dual nationality and it would be preferable to give your other nationality for some reason (which was not where you were born).

It is a bit of a pain in the arse, as the saying goes, direne, all that scrolling down. I had to do it today while sorting a US visa waiver for Minibags. But it's just the way the cookie crumbles (sorry!). England is my country of birth, British is my nationality, and the UK is where I live (in the Scottish bit).

I guess it comes of having a complicated history.

I presume US citizens are that by birth, except when they were born somewhere else, like my brother, by nationality and by where they live, except when they live somewhere else. IYSWIM.

1536 – Kingdom of England and Wales. A bill enacted by King Henry VIII which effectively made England and Wales the same country, governed by the same laws.

Well, that is very interesting.
The Tudor surname first appeared in the ancestry of Henry VII in the 1420s, when Owain ap Maredudd ap Tudur ap Goronwy ap Tudur ap Goronwy ap Ednyfed Fychan abandoned the Welsh patronymic system and adopted a fixed surname. Had he, as was generally the custom, adopted his father’s name, the English throne would have been occupied for a century by the Maredudd dynasty. He opted instead for his grandfather’s name – a prescient choice, for Tudur or Tudor comes from the Brythonic tud (territory) and rhi (king).

And therein lies the difference
United Kingdom, Great Britain and the British Isles are all different land areas:

www.historic-uk.com/HistoryUK/HistoryofBritain/The-UK-Great-Britain-Whats-the-Difference/

I have noticed on some sites/forms it is listed as Great Britain, on others United Kingdom

You can hardly complain about alphabetical order, or can you Direne3??

I get what you mean. I'm Welsh but British iykwim and I've noticed that, on application forms, I have to delve very deeply for "white British".

Drives me crazy.

I am definitely Scottish even although I have lived in England 40+ years.

I'm quite relaxed about the whole Scottish, English, Irish, Welsh thing but my DH is adamant he's Scottish! Was quite horrified when we took a coach trip from mainland Spain to Gibraltar and the coach guide requested to have a cursory glance at all passports and after looking at ours said "English OK". Of course I am and feel Scottish, after all that's where I was born and where I live but we are all part of the UK and are British. UK is always near the bottom of a list. I usually page down straight away.

Americans could feel even more aggrieved about scrolling down to find USA