- 64 As regards staffing, it is positive that there is the regular presence of a social worker and a psychologist but they should be more proactive in engaging with the young persons and not merely wait for a request to be seen. Moreover, staff working inside the facility should be non-uniformed, receive special training for working with juveniles and be composed of both sexes; the presence of both male and female staff can have a beneficial effect in terms of the custodial ethos and foster a degree of normality in a place of detention. At the time of the visit, the male police officers on duty were not trained to work with young people and they merely performed guard duties with little meaningful interaction with the juveniles. The CPT also reiterates that children deprived of their liberty should also be offered a range of constructive activities (with particular emphasis on enabling a child to continue his or her education). In sum, Amygdaleza Special holding facility continues to operate like a police detention facility and is totally unsuitable to meet the needs of unaccompanied minor irregular migrants. 107. Petrou Ralli Special holding facility for irregular migrants has been visited by CPT delegations on numerous occasions since its opening in late 2005. It remains totally unsuitable for holding irregular migrants for prolonged periods (see paragraphs 114-117).71 At the time of the 2015 visit, it was holding 20 unaccompanied minors in six cells, each furnished with five concrete plinths. There was limited access to natural light and the toilet facilities were dirty and malodorous. Further, they had only been offered one hour of outdoor exercise on three of the six days they had been detained and no organised or purposeful activities had been offered to them. In addition, the minors, who had recently survived a traumatic sea crossing, were provided with no information about their future, were denied access to their personal belongings and mobile phones, and very few had received any support from a psychologist or social worker. In sum, Petrou Ralli is even less well equipped than the Amygdaleza Special holding facility to look after unaccompanied minors and every effort should be made to avoid holding them in this establishment. If, exceptionally, they are held for short periods at Petrou Ralli, they should be provided with several hours of organised outdoor exercise and recreational activities every day and given the necessary psychological support they require. 108. In the light of the above remarks, the CPT reiterates its recommendation that the Greek authorities take the necessary steps to ensure that unaccompanied minors, who are deprived of their liberty as a last resort, are only held in centres designed to cater to their specific needs, staffed with properly trained men and women and offering a range of ageappropriate purposeful activities. More specifically, the Committee recommends once again that the Amygdaleza Special holding facility no longer be used for the detention of unaccompanied minors; instead, more suitable premises, preferably open, should be found, which meet the above-mentioned requirements for such a facility. It also goes without saying that the Petrou Ralli Special holding facility for irregular migrants is totally unsuitable for holding unaccompanied minors and they should not be held there. 71 See, for example, the reports on the 2009 visit [CPT/Inf (2010) 33, paragraph 68] and 2013 visit [CPT/Inf (2014) 26, paragraph 75.