IHTM04240 | Changes in the distribution of the deceased's estate
From HM Revenue & Customs · Inheritance Tax Manual
Under IHTA84/S17 none of the following is a transfer of value (IHTM04024)
a variation or disclaimer (IHTM35001) to which IHTA84/S142 (1) applies
a transfer made in pursuance of the deceased’s wishes (IHTM35171), IHTA84/S143
in Scotland, the renunciation of a claim to legitim (IHTM35213) before the persons making it attained 18 years, or within two years of attaining 18 or such longer period as the Board may permit, IHTA84/S147 (6).