Where there is more than one purchaser you should seek advice about joint ownership issues, including the implications of ownership as joint tenants or as tenants in common.
With a joint tenancy, if one of you dies, the other gets full ownership of the property in which you both have a joint interest. With a tenancy in common, you will each own a separate interest in the property. This means if you die you can decide who will inherit that share. The Property (Relationships) Act will have implications for you in this case and you should seek legal advice about this.
If de facto couples are buying property it is particularly important that they seek advice from their property lawyer as to the issues that arise under the Property (Relationships) Act.