. After leaving Block 6, they turned right and after left, passing in front of the block occupied by the McCanns. She states that she saw no movement of people, and that in the immediate areas of the blocks she saw no vehicle with the exception of a small car, that appeared to her grey in colour, parked close to the window of the McCann apartment;
She declares further that she mentioned this fact to her boyfriend and that it wasn't yet summer given the movement on the roads, and at that hour movement was nill;
. States that she looked at the exit of the apartment and that from the flat above the McCanns, she saw light, and also in from of the apartment, but she could not define, concretely, where she saw the light when she passed the McCann apartment;
. Next to the tree, she did not detect any movement of people or vehicles, and nothing struck her as abnormal in that zone that would have raised her suspicions;
http://www.mccannpjfiles.co.uk/PJ/TIME_LINE_INFORMATION.htmAt least one vehicle left the Block six parking area before the alarm was raised that Madeleine was missing from her bed. No-one noticed either its departure or the route it took.
If one vehicle moved without comment from the area designated in Sadie's theory, in my opinion it is not outwith the bounds of possibility there could well have been others.
I think Sadie's theory is workable and so far I've seen no valid argument which debunks that.