Pitujones wrote:Sorry I forgot to say, The weren't married when I was born, but married years later. That seems to be the issue isn't it? It's easier when they are married
As someone else has noted, whether or not you became British (by descent) on marriage of your parents depends on the domicile of your father. It's unusual for someone with a U.K. origin to lose a British domicile- and in that case you would have become British when your parents married- however it is possible you or your father may be asked questions regarding domicile. If there are likely to be any issues obtaining this it may be better to bypass the Passport Office and apply for a Nationality Status Certificate using form NS:
https://www.gov.uk/government/publicati ... us-form-ns
If this was refused, then you would need to apply for British citizenship using form UKF, and subsequently a form MN1 application for your child.
Have you looked into what impact (if any) obtaining British citizenship and/or a British passport will have for your Spanish citizenship?
In addition- you may want to seek advice as to the impact on your spouses's immigration status in the United Kingdom if you claim British citizenship or become British, if he or she was admitted under the EEA regulations. In particular, you may wish to ensure that he or she has documented Permanent Resident status- or better still, British citizenship- before claiming your own British citizenship.
This is not intended to be legal or professional advice in any jurisdiction.