s 3ZA Irish citizens
(1) An Irish citizen does not require leave to enter or remain in the United Kingdom, unless subsection (2), (3) or (4) applies to that citizen. (2) This subsection applies to an Irish citizen if the Irish citizen is subject to a deportation order made under section 5(1). (3) This subsection applies to an Irish citizen if— (a) the Secretary of State has issued directions for the Irish citizen not to be given entry to the United Kingdom on the ground that the Irish citizen's exclusion is conducive to the public good, (b) the Secretary of State has given the Irish citizen notice of the directions, and (c) the directions have not been withdrawn. (4) This subsection applies to an Irish citizen if the Irish citizen is an excluded person for the purposes of section 8B (persons excluded under certain instruments). (5) Where subsection (2), (3) or (4) applies to an Irish citizen, section 1(3) does not permit the Irish citizen to enter the United Kingdom without leave on arriving in the United Kingdom on a local journey from any place in the common travel area.