If as you suggest Megnut the photos were in fact taken at 7.30 am afterall, that could explain why William wasn't wearing shoes, but he was wearing his shoes while riding his bike after that. That might explain why FFC said he was wearing shoes when he went missing.IF the male caregiver left twice that morning (my speculation), that could've been a more recent discovery, as LE might not have checked or even had reason to check for his vehicle on CCTV earlier than the time of his departure for his virtual work meeting.
What if....
The photos were taken at 7:30 after all?
What if...
Wm had a terrible fall while both caregivers were home?
It might explain how the male caregiver already seemed to know something about Wm being missing as he returned from that meeting, per the foster grandma's recollection.
It might explain his coming out of the loo crying. Genuine emotion over the known loss of Wm.
It might explain his lack of clarity regarding Wm and the Spiderman outfit, that he thought Wm was already wearing. (Maybe he wasn't wearing it when the male caregiver left the first time but was, the second.)
It might give context to the female caregiver's sentence about him taking care of himself, and her taking care of the children -- or however that was worded. If his meeting was given priority over the emergent situation at hand. She'd take care of it.
Is it possible, if the male caregiver did leave twice that morning, that he took Wm along for the first trip?
I am beginning to think that LE has begun to find significant holes in the timeline.
Was the male caregiver home when the infamous photos were taken?
Was the male caregiver aware that Wm had "gone missing" prior to his departure for his virtual meeting?
Where, oh, where is that sweet little boy?
JMO