Section 90 does not apply to a transfer of settled property made for consideration in money or money's worth if the amount (or value) of that consideration is equal to or exceeds the market value of the property transferred.
The following provisions apply if—
section 90 applies to a transfer of settled property made for consideration in money or money's worth, and
the amount (or value) of that consideration is less than the market value of the property transferred.
If the transfer is of all of the settled property, for the purposes of section 90 treat the transfer as being of part only of the settled property.
Deduct the amount (or value) of the consideration from the amount of the market value referred to in section 90(4)(a).