I just want to know about what will happen to these two visa holders?

1) A filipina on student visa came here last year and she met a Brit then planned to get married next month. Will her visa be converted from student to spouse? or will se go back home on the expiration of her student visa?

2) A filipina on a tourist visa overstayed for 5 years. She filed an appeal last October and was waiting for the final paper for the results. She met a Brit bf here and he plans to marry her. She said the Homeoffice told her to go back to the Phils and file a fiance visa. Is there a possibility she be granted a fiance visa if she is an overstayer?

Thanks for the replies.