Article 10U.K.Recourse to a different type of investigative measure
1.The executing authority shall have, wherever possible, recourse to an investigative measure other than that provided for in the EIO where:
(a)the investigative measure indicated in the EIO does not exist under the law of the executing State; or
(b)the investigative measure indicated in the EIO would not be available in a similar domestic case.
2.Without prejudice to Article 11, paragraph (1) does not apply to the following investigative measures, which always have to be available under the law of the executing State:
(a)the obtaining of information or evidence which is already in the possession of the executing authority and the information or evidence could have been obtained, in accordance with the law of the executing State, in the framework of criminal proceedings or for the purposes of the EIO;
(b)the obtaining of information contained in databases held by police or judicial authorities and directly accessible by the executing authority in the framework of criminal proceedings;
(c)the hearing of a witness, expert, victim, suspected or accused person or third party in the territory of the executing State;
(d)any non-coercive investigative measure as defined under the law of the executing State;
(e)the identification of persons holding a subscription of a specified phone number or IP address.
3.The executing authority may also have recourse to an investigative measure other than that indicated in the EIO where the investigative measure selected by the executing authority would achieve the same result by less intrusive means than the investigative measure indicated in the EIO.
4.When the executing authority decides to avail itself of the possibility referred to in paragraphs 1 and 3, it shall first inform the issuing authority, which may decide to withdraw or supplement the EIO.
5.Where, in accordance with paragraph 1, the investigative measure indicated in the EIO does not exist under the law of the executing State or it would not be available in a similar domestic case and where there is no other investigative measure which would have the same result as the investigative measure requested, the executing authority shall notify the issuing authority that it has not been possible to provide the assistance requested.