- 93 - -  persons detained overnight to be provided with both blankets and a mattress;  the toilet/shower facilities to be renovated and kept in a hygienic condition, and detained persons to be provided with the wherewithal to keep themselves clean;  means to be sought of enabling persons detained for more than 24 hours to be offered outdoor exercise on a daily basis;  persons detained under the Aliens legislation to be strictly separated from criminal suspects;  an information leaflet to be given to persons detained under the Aliens legislation explaining the procedure applicable to them and their related rights; this leaflet to be available in the languages most commonly spoken by such persons, and, if necessary, the services of an interpreter to be provided (paragraph 59); conditions of detention in Police Station No. 4 (Socratous St.), Piraeus Central Police Station and Glyfada Police Station to be reviewed in the light of the remarks in paragraphs 52 and 62 (paragraph 63). comments - cells of the size of those located on the 11th floor of the Athens Police Headquarters are not suitable for the detention of someone obliged to stay in custody overnight; at the very most they might, if necessary, be used for temporary holding purposes (i.e. detention for a maximum of a few hours), and this subject to the strict condition that they are equipped with adequate lighting and ventilation as well as a means of rest (paragraph 60). ii. Larissa recommendations - the two cells at Larissa Police Headquarters to remain out of use until such time as they are thoroughly cleaned, redecorated and refurbished and, more specifically, brought into conformity with the criteria set out in paragraph 52 (paragraph 65). iii. Thessaloniki recommendations - as regards the detention facilities at Thessaloniki Police Headquarters:  remand and sentenced prisoners not to be held in those facilities (but instead in an appropriate prison establishment);  no-one to be held in those facilities for longer than is absolutely necessary;