In my opinion ... The window was not open when he did his check as he explained to the police - no fluttering curtains, no sounds, no draughts - he reckons he could hear twins breathing it was so quiet but not notice a fully open window with cold wind haha - he was in there for a few minutes looking at books by the light in the living room. You have no evidence of it being open before Matt's check. Russell and Jane went through the car park after Matt's check and didn't notice a unmissable raised shutters and open window from one of the children's bedroom. The twins didn't wake with an open window for 30 minutes. No evidence leads to an open window before Matt's check. In my opinion ... The only person that connected to an open window before Matt's check was Tannerman who McCann supporters love to blame as the abductor.
Listen Up! SY has found Tannerman. He is history!
Caveat added
Matt didn't say he could HEAR the twins breathing, he said he could see them breathing, now how come it was light enough for him to see that the twins were breathing?
He also says this - Reply 'The rest is just sort vague impressions of, erm, of the colour of the curtains, I couldn't tell what particular pattern, but I just remember green and yellow with that. And there may have been a duvet on the back bed behind the two cots. But nothing else specific'.
GREEN AND YELLOW, yet the duvet was blue, the curtains were blue, so how come he remembers green and yellow, as Misty said way back 'the street light was shining on the curtains'as the blind was up IMO turning the curtains green and yellow.