A Zambrano carer is a parent or carer from a non-EEA state whose residence is required in order to enable a child or dependant adult to live in the European Union.  

Most Zambrano carers are protected by EU case law or the Brexit Withdrawal Agreement (if they reside in the UK). 

Migrant parents of British children based in the UK, however, are excluded from the Brexit Withdrawal Agreement, because they have not exercised their free movement rights.