I tried to add my partner (Husband now) to a title of a house I had in my name only. You have to prove that you have been together for a certain period of time... I think it was 12 months. And yes i thought it was very funny the "Love and affection" bit.
At the moment we are going through a refinance and the title is in my old name not my new married one, just have to wait and see if that will be a problem!