The story is a bit blunt. You never told us how many years they're been married, do they have child/children. Well, anyway, if they will end up having divorce and their worries is their marriage in the Phils., it's not a problem. As long as the woman still a filipino citizen, divorce is valid in the Phils., foreign national will be the one to file divorce cause if filipina it will be void. Both then, can remarry, either here in the U.K or in the Phils.