IHTM14331 | Lifetime transfers: gifts with reservation (GWRs): the reservation: initial requirements
From HM Revenue & Customs · Inheritance Tax Manual
In considering the reservation you are concerned with establishing whether:
If either requirement is not satisfied, the gift is one with reservation.
You will also have to consider the impact of any changes in the property given (IHTM14313).
There are separate instructions relating to insurance policies (IHTM14451).