New Born Baby

Hi,
Good evening, I'm new here I have a big question, see if you can help me with some ideas please.
A bit of my story to explain myself better
I am Venezuelan, I have a girlfriend (not married yet) and our son has just been born, well as of December 16 in England I am living in Spain now ...
My question exists a possibility to declare to me through as father the UK embassy in Spain.
Thank you