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possibilities are Riyadh or Zaire, but the FCO is considering alternatives. • The RAF would need to obtain advance diplomatic clearance for overflying: operate without such clearance could put clearances for normal military flights at risk. It would not be possible to count on receiving clearance ! from the countries concerned. Destinations which could be reached without I overflying are being considered. These matters are being studied by the FCO I and the MOD. • . \ 20. With a chartered or EAF aircraft, a police escort is likely to be necessary. It is part of the police plans to disarm all members of the Ugandan party once they land in the United Kingdom; their weapons will be confiscated (using Customs' powers) and for safety reasons will not be returned to the Ugandans on their departure. They could be returned via diplomatic channels once Amin and his party were back in Uganda. Place of detention 21. If Aain arrives at Heathrow or another civil airport! he could be held there for up to six hours without too much difficulty. If there were any question of holding him for appreciably longer, another place of detention would have to be found to which he could be transferred by helicopter. We and the MOD are considering a number of possible locations, both civil and military, Including RAF Brize Norton. In addition MOD are examining urgently with Thames Valley police whether it v/ould be possible to isolate Amin in a secure area of RAF Brise Norton without disrupting its normal life, or causing unmanageable security problems. Once a decision has been taken as to • where Amin is. to be detained, the Home Office will make an order designating the site as a place of detention under the Immigration Act 1971• Unheralded arrival 22. All notified arrivals from Uganda to Stansted will be covered by precautions arrangements made by the Essex Police, so that, if Amin is an unannounced passenger on any of them, appropriate action can be taken. 23- We have to anticipate the possibility that Arain's aircraft may land somewhere of its own choosing, in defiance of NATS, even in Scotland. To cover this possibility, or the possibility of his arriving by a scheduled service, once an announcement of the decision to exclude Amin has been made, the Immigration and Customs "Service will be put on notice that the Home Secretary has decided that Amin should be refused permission to enter, and will be advised to consult their local chief officer of police as to what to do- if