It is not possible for an adult to be adopted in the U.K. the only option open is for the adults to change or arrange each aspect of their affairs. The 'parent' would.
I want adult adoption to be legal in the UK because when my biological mum died of lung cancer 8 years ago I really missed her. Then my biological dad met.
Adult adoption is a form of adoption between 2 or more adults in order to transfer inheritance In the United Kingdom, only children may be adopted.