Think the 'probed' FRL B2s may have had non-functional probes, being used for 'dry' prods only.
The Canberras at Punta Arenas during Corporate were seen by a UK journo (Jon Snow if memory serves) who was familiar with the type from reporting on South Africa and Rhodesia. The Herc was 'spotted' according to legend because, though it wore full Chilean markings, someone had mis-spelt the air force's name as 'Fuerza Area Chile' instead of 'Fuerza Aerea Chile'....
So far, however, I haven't seen sufficient evidence to prove the stories of RAF aircraft (whether Nimrod R, Canberra
PR or C-130) in Chile are any more than rumour or wishful thinking.