Given the current divorce rate in the country if one spouse has good credit established, then it is equally important for the other spouse to establish credit in his or her own name.

Some major life events with important financial implications are (but not limited to):

Starting work.
Changing jobs. 
Changing address. 
Marriage and civil partnership.
Getting separated or divorced.
Arrival of children. 
Onset of serious illness or disability.
Death of a pension scheme member.