United Kingdom - Passport & Nationality - British Citizenship by Double Descent (UKM 12(5)1948 PGF) Partner
Your partner may have a claim to British nationality if the following criteria are met:
- your partner was born after 01.01.1949;
- your partner's paternal grandfather (i.e. father's father) was born in the UK (including Scotland and Northern Ireland); AND
- the marriage of their parents must have taken place before 01.01.1949.