In England, the legal process of adoption typically applies to children who are under the age of 18. Once an individual reaches the age of majority, which is 18 in England, they are considered adults in the eyes of the law and are no longer eligible for adoption. Adoption is generally intended to provide permanent legal guardianship to children who are in need of a stable family environment.
For instance, they may be eligible for other forms of legal guardianship or assistance, such as a deputyship through the Court of Protection or a power of attorney arrangement. These legal arrangements can provide support and decision-making authority to individuals who are unable to make decisions for themselves or require assistance due to physical or mental incapacity.
It's important to consult with a qualified legal professional or social services in England to understand the specific options and processes available based on the individual's circumstances. They will be able to provide tailored advice and guidance based on the specific situation.