Right of admission to the United Kingdom
11.—(1) An EEA national must be admitted to the United Kingdom if he produces on arrival a valid national identity card or passport issued by an EEA State.
(2) A person who is not an EEA national must be admitted to the United Kingdom if he is a family member of an EEA national, a family member who has retained the right of residence or a person with a permanent right of residence under regulation 15 and produces on arrival—
(a)a valid passport; and
(b)an EEA family permit, a residence card or a permanent residence card.
(3) An immigration officer may not place a stamp in the passport of a person admitted to the United Kingdom under this regulation who is not an EEA national if the person produces a residence card or permanent residence card.
(4) Before an immigration officer refuses admission to the United Kingdom to a person under this regulation because the person does not produce on arrival a document mentioned in paragraph (1) or (2), the immigration officer must give the person every reasonable opportunity to obtain the document or have it brought to him within a reasonable period of time or to prove by other means that he is—
(a)an EEA national;
(b)a family member of an EEA national with a right to accompany that national or join him in the United Kingdom; or
(c)a family member who has retained the right of residence or a person with a permanent right of residence under regulation 15.