Interest in land is defined in IHTA 1984, s. 190 only in so far as it is stated not to include any estate, interest or right by way of mortgage or other security. An interest in land includes (IHTM33061): .
•any estate or interest in land and buildings;
•of any tenure;
•whether in this country or abroad; and
•any interest in such land or buildings under a trust for sale.
The interest in land must be comprised in the deceased's estate. It is not sufficient that it underlies what is included in the estate, for example an interest in partnership where a partner has no right to specific partnership assets or a reversionary interest.