IHTM30421 | Reconsideration of value: introduction
From HM Revenue & Customs · Inheritance Tax Manual
There are various situations in which you may need to decide whether you are free to reconsider the value of property. In these instructions they are dealt with under two main heads
where taxpayers either offer tax on an increased value () or seek a reduction in value ()
or
where we wish to initiate a change in value ().