Even if you are married, your spouse is not necessarily entitled to benefit from your whole estate on your death. The intestacy rules are constantly subject to change and the outcomes of dying without a Will can be surprising and often unjust. Making a Will is the only way to ensure your loved ones are provided for in accordance with your wishes. The intestacy rules do not make any provision for unmarried partners. The best way to ensure a cohabiting partner is provided for is to make a Will.