E/CN.4/1996/72/Add.4 page 14 Nationality United Rep. of Tanzania As at 10 May 1995 As at 13 January 1995 As at 18 November 1994 1 - 1 Yugoslavia (countries of former) 11 7 6 Zaire 10 17 22 Zimbabwe - 1 1 Others 2 2 5 Nationality doubtful 4 2 3 646 572 654 Total Source : Home Office Statistical Bulletin. United Kingdom 1994 , 30 June 1995, para. 23. Asylum Statistics a/ Persons detained solely under the powers contained in Schedules 2 or 3 of the Immigration Act 1971. In some cases the asylum application will have been lodged subsequent to the applicant being detained. The figures include both detained asylum applicants who applied at ports, and those detained in after-entry enforcement work. These figures include people awaiting the setting of directions for removal following refusal of the application, as well as those whose applications were under consideration or subject to appeal. 54. The nationalities of detainees change from month to month, but the majority are Africans and Asians, as indicated in Table 2. The length of detention ranges from one month to one year, depending on how quickly the detainees’ supporting documents and papers are assembled, either to authorize them to enter British territory, or to expel them. The Home Office gives priority to consideration of detainees' files but does not always receive cooperation from either the detainees or their country of origin in establishing their real identity and nationality, which is why the procedure takes so long. 55. The Special Rapporteur visited the Campsfield holding centre, in the Oxford area. He notes that the reception conditions are good and that detainees may avail themselves of an attorney of their choice and confer with him at the centre. They may also maintain contact with the outside world by telephone. He nevertheless wonders whether it was appropriate to have turned the management and supervision of the centre over to the private security firm Group 4. 56. There is not very much to add about detention conditions at Campsfield, but according to sources, detainees at the Harmondsworth holding centre near Heathrow Airport are exposed to the constant noise of aircraft taking off and landing. 57. He regrets that asylum-seekers and undocumented immigrants are being held in such prisons as Pentonville, Holloway, Wandsworth, Wormwood Scrubs and Brixton, near London, in the company of common criminals.