A private foster care arrangement will exist if the person who will have full-time care for more than 28 days of a Tier 4 (Child) migrant under the age of 16 (or under the age of 18 if they are disabled) in the UK is an adult who is not their parent, legal guardian or a close relative. A close relative is defined as a person over the age of 18 who is the child’s grandparent, brother, sister, step-parent, uncle (brother or half-brother of the child’s parent), or aunt (sister or half-sister of the child’s parent). For guidance, see Tier 4 policy guidance, paras 45–47. The Immigration Rules, Part