Father was asked for DNA test to get a passport for his daughter

New post-Brexit rules mean that dual nationals cannot enter the UK unless they have a British passport My teenage daughter is unable to see her grandparents because of the UK’s new requirement for dual nationals to hold a UK passport. I’m a UK citizen, married to a French national, and we live in France. Our two older children have both French and UK passports. Our third child was born while we were living in…