Uk citizenship

Hello everybody,
I dont know if this is the right section to post my question, but if this is not the right one so please moderators can remove my thread from here.

I have a friend who is living in Us, with no papers, and he dont want to go back in his country, but he has a girlffriend which is living in Uk, and she has Uk visa which is valid to the end of her life, I forgot what is exatly the name of the visa, but it's probably something like citizenship. So the question is, if she came here in Us, and married him is he going to take her status of Uk citizen, and is he will be able to move with her in Uk?

Whether your friend's girlfriend has indefinite leave to remain in UK, or is a British citizen, he won't get any special status by marrying her. He would still need a visa to settle in UK - see www.ukvisas.gov.uk

I should also say that there is potentially another hurdle: if he is in the USA illegally, your friend won't be able to apply for a UK visa from there. He will need to return to his home country to make the application

thanks for the advice.
regards