Some food for paranoid thought:
The court will have to look at the intention behind these payments, e.g. did you make the payments as a gift, a loan, or payment of rent, or for example, was it intended by you and your partner that you should have an interest in the property ?
If you are not a joint owner of the property you may still be able to claim an interest in the property if you can show you have contributed to the property in other ways. For example, by paying for improvements to the property, or if you paid the deposit or part of the purchase price. Or if you are paying money towards the mortgage repayments.
It is important to keep details of any payments you make as you will need to prove you have made these payments in order to establish your interest in the property. You might be able to argue that your partner promised you a share in the property. You will need to explain how and when this promise was made. Your argument will be stronger if you have a witness who was present when this promise was made. If you can prove this then the court may force your partner to keep that promise and grant you an interest in the property.
If you can show your partner made promises that you would have a share of the property and you relied on this and spent money on the property, the court may stop your partner from going back on his or her word.
The court can decide how much your stake in the property is worth. The court can make orders to restrict or exclude one partner from occupying the property. Or set conditions that the person remaining in the property pay all the bills and other expenses, or take over any responsibilities connected to the property.
The court can also order that partner to pay compensation to the partner who has to leave the home. The court can also order one partner to give up any payment or benefit connected to the property, for example rent.
