my partner and I paid equal deposit of £7500 which was 7.5% each of house price when we bought house in 1997. I then paid all mortgage payments and paid for a loft extension and double glazing. the other party contributed zero , I paid off the mortgage with an inheritance in 2005. I have applied to change from joint to in common will I have a case to claim a large percentage in court. I have proof all payment came out of my account and other party never worked