Русско-англо-русский юридический словарь

Before 1925, wills which dealt with real property were regarded as title deeds in their own right, and formed a crucial part of the evidence proving title to a particular estate or piece of land. (website of the University of Nottingham)

The legal interest in a property refers to the right to possess or use property. It belongs to the legal owner, ie the person who is registered at the Land Registry on the title deeds. Legal interest gives the owner a right of control over the property, which means they can decide to sell or transfer the property. (Rocket Lawyer)