The general principle of British nationality for the past hundred odd years has been that British nationality can only be transmitted automatically for one generation outside the UK and its territories. Over the past century, the definition of the territories has changed over time, with the rise and fall of the British Empire.
GarryMonty wrote: ↑Tue Aug 06, 2019 8:45 pm
it's regarding having a baby while still on ancestral
If the child is born in the UK, s/he will be entitled to be registered as a British citizen when one parent (most likely you) acquires ILR.
If the child is born abroad, the child will have the same immigration status as the less-privileged parent (most likely the other parent), will need to apply for ILR themselves and can register at discretion (i.e. not an entitlement) when at least one parent is a British citizen and the other parent and child both have at least ILR.
As you can see, British nationality law favours birth in the UK.
I am not a lawyer or immigration advisor. My statements/comments do not constitute legal advice. E&OE. Please do not PM me for advice.