he was on a student visa, and for the last few years and he would have only been able to work for up to 20hrs a week,
now if he was not Filipino, I'm sure most people on here would be saying he was playing the system, and he should be deported.
there rules apply to everyone and that includes Filipinos.
i would have thought she became a British citizen after living in the UK for at least 3yrs, he probably couldn't be registered as British because because he would have been over 18, and he would have had to come to the UK on his own merits, ie student visa which is not a settlement visa.