Basically a couple bought a house 2 years ago, he was working full time and could have got it in his name on his wage, but both names went on, she was a full time uni student and worked part time.
he payed the mortgage and most of the bills and she contributed to the bills.
2 years down the line they have split, the house has been valued at £15,000 more than what they originally paid, so if he wants to buy her house and take her name off the mortgage, what is amount is legally/morally fair to offer her?