- 20 As a safeguard against ill-treatment, as well as for reasons of public and individual health, the CPT has repeatedly advocated that the Greek authorities establish a system of regular visits by doctors to police (and border guard) stations to screen new arrivals and enquire whether there are detainees with potential medical problems. It has also stated that, at a minimum, a person with a recognised nursing qualification must be present on a daily basis at all centres for detained irregular migrants. However no action has been taken to date to put in place such a system. The CPT calls upon the Greek authorities to take adequate measures to ensure medical care is provided on a regular basis at all facilities where irregular migrants are held. 6. Staffing 41. In the past23, the CPT has advocated the establishment of posts of specialised custodial staff for persons detained by law enforcement agencies, with full responsibility for detained persons, including medical and legal oversight. In order to be fully effective, such custodial officers should have both the authority and the responsibility to verify whether basic rights of detained persons, such as notification of deprivation of liberty, access to a lawyer, etc., have been respected, and to take appropriate action if this is not the case. The CPT reiterates its recommendation that the Greek authorities give due consideration to the proposal to establish posts of specialised custodial staff for persons detained by law enforcement agencies. 42. Further, as regards staff working in centres for immigration detainees, the CPT attaches particular importance to the careful selection and appropriate training of supervisory staff in such centres. As well as possessing well-developed techniques of interpersonal communication, the staff concerned should be familiarised with the different cultures of the detainees and at least some of them should have relevant language skills. Regrettably, no efforts have been made either to assign specially trained and dedicated staff to work with irregular migrants or to increase staff numbers. Consequently, the only role left to the police officers is one of control and enforcing a “warehousing” policy. The staff complement attached to the facilities visited remained totally insufficient; for example at the time of the visit, the Filakio centre had only eight police officers on duty during the day for 488 irregular migrants. The CPT once again calls upon the Greek authorities to review the staff complement attached to each special facility for irregular migrants and police holding facility. Further, the Committee recommends that the Greek authorities provide adequate training for staff working in dedicated detention facilities for irregular migrants. 23 See for instance CPT/ Inf (2009) 20, paragraph 18.