Hi can anyone help me ?

I have an ancestor who, according to the UK census, was born in Germany - about 1845 - but states he was a British Subject....

I have asked at the British International Births section of the Register Office, and there is no record of his birth.

His father is named as James ENOCH, according to his marriage certificate, in 1870, when he marries in Yorkshire, England.

Could he be a child born to British parents living abroad and if so :-

1. Would he have had to be registered in Germany and if so, why was he not registered in Engalnd when he came here ?

I am assuming is parents brought him back to the UK but can't be sure of this as I have no way of knowing when ?

2. Could he be German and taken British Citizenship when he came here ???

ANYONE WITH ANY THEORIES .... please post, here... I would be eternally grateful.....