The law does not recognise "common law husband and wife relationships." You are either married, civil partners or cohabitating.
Unlike the law relating to couples who are married or in a civil partnership, the law applied to resolving disputes over property is complex and often turns on small points of detail.
There may be claims against the other party who has a property in their sole name in which the parties have been living.
There may be a dispute about what constitutes a fair share of a property owned in joint names.
There may be a dispute about what one party has promised the other during the course of the relationship.
If you are thinking about living together without formalising your relationship by way of marriage or civil partnership, you may want to consider entering into a "cohabitation agreement" which would set out the financial and domestic arrangements between the parties thereby avoiding confusion and bad feeling should you later separate.
If you require further information regarding your relationship please contact us and take advantage of our free initial consultation.