If you are married or in a civil partnership with someone who is a tenant, you have home rights. ‘Home rights’ is a legal term that generally means that you can live in your home as if you were the tenant.
If your spouse/civil partner is the tenant, their tenancy is secure, assured or regulated and they leave, the tenancy will continue unless they give a valid notice to quit to the landlord. If you have home rights, and your partner wants to end the tenancy, there may be action you can take to stop them.
If your partner’s tenancy is an assured shorthold, bear in mind that the landlord can end it by serving two months’ notice, and does not need to have a reason for doing so. Because an assured shorthold tenancy offers little security, it’s sensible to talk to the landlord about whether they will let you stay on before deciding whether to apply for home rights.