IHTM09733 | Related property: definition of related property
From HM Revenue & Customs · Inheritance Tax Manual
Property () is related to property in a person’s estate () if:
it is comprised in the estate of that person’s spouse or civil partner (), or
it is or has within the previous 5 years been the property of
a charity (), or held on trust for charitable purposes
a qualifying political party ()
a registered housing association (), with effect from 14 March 1989
one of the bodies and institutions () listed in schedule 3, or a body to which applies
and became so following an exempt transfer by the deceased, transferor or that person’s spouse or civil partner after 15 April 1976.
For the purposes of transfers to a charity or one of the other bodies listed above,whether a particular person is another’s spouse or civil partner depends on that person’s status at the date of the transfer that is being valued and not the earlier exempt transfer.
If a charity or other body sells on the assets transferred to them to another such body, then
the property would no longer be the property of a qualifying body, and
the 5 year period would start to run from the date of the sale.