However, access to outdoor exercise was restricted in the other centres. For instance, detained persons were only granted four to five hours of outdoor exercise per day at Corinth PRDC, and only one to two hours at Petrou Ralli, which was due to the rotating timeslots and the high number of detained persons per police officer. In the latter centre, outdoor exercise was restricted to between 30 minutes and one hour during weekends, which is insufficient. In addition, outdoor exercise yards lacked shelter and benches at Corinth, Fylakio and Kos PRDCs, and there were no benches in the outdoor yards at Paranesti PRDC. Further, the outdoor spaces contained no sports equipment, and the yards were austere. 81. Moreover, in all pre-removal detention centres visited, there was a total lack of any purposeful or recreational activities on offer, and detained foreign nationals were left to their own devices with literally nothing to do all day long, for periods of several months. Occasionally, they were able to play cricket or kick a ball in Corinth, Fylakio, Tavros (Petrou Ralli) or Xanthi PRDCs. Further, only Tavros (Petrou Ralli) and Paranesti PRDCs were equipped with television screens (kept turned on the whole day, which was particularly disturbing for the persons held in the cells opposite). Paranesti PRDC was the only establishment with a common association room, but these rooms did not contain tables and chairs. There were no places for worship in Corinth and Tavros (Petrou Ralli) PRDCs. 82. The CPT wishes to recall that the conditions of detention for foreign nationals held under immigration legislation should reflect the nature of their deprivation of liberty, with limited restrictions in place and a varied regime of activities. The longer the period for which persons are detained, the more developed should be the activities which are offered to them. In light of the above, the CPT calls once again upon the Greek authorities to take the necessary steps to ensure that, in all pre-removal detention centres in Greece: - - an open-door regime is applied, including at Corinth, Fylakio and Tavros (Petrou Ralli) PRDCs; all outdoor yards are appropriately equipped with benches and shelters and provide for a decent and non-carceral environment; a programme of activities (educational, recreational and vocational) is developed, including a variety of different activities such as, for example, language classes, games, arts and crafts or “cultural kitchens”); a common association room, equipped with tables and chairs, a television and games is created; a place for worship is set up, including at Corinth and Tavros (Petrou Ralli) PRDCs. 83. Moreover, at Corinth PRDC, the delegation met seven young men who self-identified as unaccompanied children but who had been registered by the authorities as adults. They were held separately in one of the cells of the upper wings in B building, until the relevant age assessment procedures and verifications had been carried out. At the time of the visit, they had been segregated for two months in their wing without being granted access to outdoor exercise – they had only been allowed to go outdoors for the previous three days. Young persons who claim to be unaccompanied and separated children should be treated as such until the appropriate assessments have been carried out. These young persons require additional staff support, the provision of organised activities and the possibility to spend much of the day outside in the fresh air. The CPT recommends that the Greek authorities take the necessary steps to ensure that all detained persons who claim to be unaccompanied children be treated as such until proven otherwise, unless their claim is manifestly unfounded. To this end, they should be held in a child-friendly environment and provided with the necessary assistance and support by appropriately trained staff. 25