from 6 april 2015, a child born out of wedlock before 1 july 2006 to a british father is entitled to register as a british citizen "by descent" under the immigration act 2014 using form ukf. such child must also meet character requirements, pay relevant processing fees and attend a citizenship ceremony. however, if the applicant has a claim to register as a british citizen under other clauses of the british nationality act 1981, or has already acquired british citizenship after being legitimised, the application will be refused.