“(1) … where, on or after18 March 1986 , an individual disposes of any property by way of gift and either – (a) possession and enjoyment of the property is not bona fide assumed by the donee at or before the beginning of the relevant period [here the period from the gift to the date of death]; or (b) at any time in the relevant period the property is not enjoyed to the entire exclusion, or virtually to the entire exclusion, of the donor and of any benefits to him by contract or otherwise; … (2) It and so long as – (a) possession and enjoyment of any property is not bona fide assumed as maintained in subsection (1)(a) above, or (b) any property is not enjoyed as mentioned in subsection (1)(b) above the property is referred to (in relation to the gift and the donor) as property subject to a reservation. (3) If immediately before the death of the donor, there is any property which, in relation to him, is property subject to a reservation then, to the extent that the payment would not, apart from this section, form part of the donor’s estate immediately before his death, that property shall be treated for the purposes of the 1984 Act as property to which he was beneficially entitled immediately before his death.”