Where a purchaser of a property dies between
the interest of his estate is in the property itself not the
cash used to purchase it.
You should therefore refer the property to the VOA (
IHTM23002) in the normal way.
In Scotland if the purchaser has not obtained a registered
title to the property, the matter should be referred to TG for
advice before any reference to the VOA is made if the point is
likely to be material.