The UK can deport European nationals. An EA national under EU current law can only be deported under EU law on public policy or public security grounds. A decision to refuse admission or to revoke residence or to remove is only permitted on “serious grounds” of public policy or public security. “Serious grounds” are not defined in the EA Regulations, but case law says that EA nationals with 10 years residence in the UK can only be deported on imperative grounds of public security.