different rules apply to british protected persons and certain british subjects (that do not apply to british citizens). a person who is a british subject other than by connection with the republic of ireland loses that status on acquiring any other nationality or citizenship, and a british protected person ceases to be such on acquiring any other nationality or citizenship. although british overseas citizens are not subject to loss of citizenship, british overseas citizens may lose an entitlement to register as a british citizen under "s4b" of the 1981 act if they acquire any other citizenship.