Look up Colin Sutton in the British police and get back to me with a realistic opinion there.
I've looked him up. So, the operation wanted to prevent that British inspectors are led down the garden path by the Portuguese police? Oh well.
I have just reviewed the Austrian case of Natascha Kampusch. (It happened - roughly - in my neck of the woods). And I have to say, I do no longer believe the single perpetrator theory (even though she has always maintained there was only Priklopil). I just don't. Two high Austrian judges didn't and were dragged through court for it. One investigator didn't and ended up suicided (with a foresnsic expert saying it was no suicide and his notebook missing...). And a witness maintaining for all those years she saw 2 men grab the girl and correctly describing the car as it turns out...
I'm still inclined to believe CB acted on his own and didn't pass anyone on. But, damn.