Married? You have far more rights than if you have simply live(d) with someone.

The Courts have a wide range of powers to deal with all assets e.g. cash, pensions, property, possessions, investments. If there are children then quite often a Court will
not order the sale of a property until the children have finished their education.
You ought to take legal advice.

Not Married? The law is complicated.

Contrary to popular belief, if you have cohabited with someone for even many years, you do not necessarily acquire any rights to their property · If a house is in the sole name of the other partner, to achieve an interest in it, you would have to show that you had made an actual financial contribution towards the purchase of the property and that you both intended that you should have some interest in the property. There is no simple answer
to who owns what. You ought to take legal advice.

Civil Partnership You have the same legal right and remedies irrespective of gender.