he has the power of a constable under Article 61 of the 1989 Order (fingerprinting) to take fingerprints at a police station without the appropriate consent;

the requirement by virtue of paragraph (7A)(a) of that Article that a person must be informed by an officer that his fingerprints may be the subject of a speculative search may be discharged, in the case of a person at a police station, by his being so informed by the designated person.