If Jane had turned left into the alleyway, she would not have been able to see anyone at the top of RFGdM as GM & JW would have blocked her line of sight.
When JW saw the lady in purple it was still daylight. When he was speaking to GM it was dark. He may not have seen Jane coming from the Tapas Bar due to parked cars & he may have been looking at his child when Jane passed behind GM.
Quite why it is still necessary to dispute that Jane did see a man with a child where & when she stated is beyond me.
This witness statement differs from Jane. Even at the beginning, things were not adding up! Seeing a man walking past in the direction to the road that leads to Baptista supermarket is at the back of the apartment where the middle path leads to. You could see the man crossing the car park entrance if coming from that direction.
At some point she translated the statement of one of the ladies who belonged to the group and that she describes as a brunette one. This lady said to the GNR elements, and she (the witness) translated, that she had seen a man on the road who might have carried a child.
This situation surprised her because she (the witness) was convinced that when the lady saw the man, the lady was in a place from where she had no angle of vision for the place where she saw the man. She doesn't know exactly what was the position of the lady when she saw the man, but she knows that the lady said she saw the man in the street in front of the Madeleine's bedroom window, walking in the direction of the street that then leads to the Baptista supermarket.
http://www.mccannpjfiles.co.uk/PJ/SILVIA_BATISTA.htm