A. No. Having a British passport does not mean that your birth was automatically registered in the UK. Your birth may have been registered, by your parents, with the British authorities in the country of birth, but registering is not compulsory.
A. No. Registering with the British authorities is not compulsory. It is not a service which everyone takes up.
A. Births, marriages and deaths registered by the British Forces and the British Consul or High Commission in the country where they took place, from 1849.
Deaths that occurred in the Boer War and both World Wars.
British Army Regimental records of births, baptisms and marriages dating back to 1761.
Marine Births and Deaths, from 1837, which took [...]