Annual Report 2014 of the National Preventive Mechanism deemed necessary to safeguard both the rights of the inmates to information prior to their being expelled and their physical safety. 116. A general lack of medical certificates issued to the inmates who are to be expelled not only to those with a known pathology to confirm that there is no objection from the medical point of view to realise their expulsion, has been verified, which situations may imply a risk to health if they suffer certain pathologies that would have to be ruled out. It is necessary for the medical examination to be carried out at the CIE and the result should be accompanied by the clinical record containing, at least, the background information, diagnosis and prescribed treatment. 117. Special attention is given to the existence of video-surveillance and videorecording systems at facilities for deprivation of liberty, on considering that such systems would considerably facilitate the investigation of any allegation of undue conduct on the part of the personnel providing their services at such facilities. This would benefit both the persons who may have suffered such undue conduct, and the public officers unfoundedly accused of ill-treatment or psychological pressure. Such technical means should extend to include all facilities at which persons deprived of liberty may remain, other than toilets and rooms to hold interviews with lawyers. Screens to view pictures at the CIE of Tenerife 118. It has been observed, and this is a reason for concern, that not all public officers performing custody tasks are duly identified. The necessary measures should be put in place, including of a disciplinary nature, for due performance of this obligation. 119. The security and surveillance personnel of CIE face a particularly difficult task. The recommendations for the tasks of the police to be limited to external surveillance of these centres have not been met, so that said personnel should be selected with 62