I have been declined by Nationwide today in a Decision in principal change of borrower application. I honestly thought it would all go through fine (buying ex out of house but I was only asking to take over entire mortgage in first instance). I was declined. It's mad as the mortgage payments are less than it would cost me to rent a one bed flat where I live. My oldest turns 17 soon and so I wondered if any mortgage experts knew what age your children need to be before they affect your affordability. I am guessing 18? I have a nearly 15 year old and a nearly 17 year old. Without being able to put the mortgage in my name I can't get divorced and given ex walked out just over 2 yrs ago I'll have CGT to think about soon.