Eddie - it depends on whether you rushed orf to the British Consulate to register it.
If you registered it in Zambia - she's Zambian.
One of my frenz commented - you are damned right I did, I did it later on in the day.
Naughty naughty people such as my Dad, was born in the Union of SOuth Africa that is, naturalised to British in the fifties and then renewed his South African passport without renouncing (acquired) British nationality, which made us all stare in disbelief.. But I do not (have any rights) as he didnt register my birth at birth and I am not resident in RSA.
Irish nationality is a specialised area - as before 1922 the Irish were erm English if you get my meaning. The borders were never closed. So a lot of our contemporaries have rights because their parents were born in the United Kingdom as was.
They have a right to vote so long as they can show they are resident.
And 186 000 of them were welcomed with open arms into the British regiments during the war - and when they returned South I think were denied civil and political rights.....
You see the British birth certificate was secured by fraud so I am sure there is room for manoeuvre. Oh and good news you can t be made stateless - that is the Brits cannot deprive you of nationality unless you have one to go to - even on the grounds of fraud (there's treaty about this)
I agree there are evidential problems about this
( but the q wasnt do you think this will be hard to prove)