Just to clarify. It was claimed by the prosecution that he climbed out the window above the kitchen sink the morning of the murders as items on the sink appeared to have been moved aside to facilitate his exit and a small amount of watery blood was allegedly found on the window. I take it then that it was the bathroom window which he used much later to gain access in order to retrieve his passport?
ps removed the crowdjustice link for obvious reasons.
The bathroom/shower-room window was the one JB used to gain access on two occasions - on the night of the murders (allegedly), and several weeks later to collect some travel documents before going abroad, when he left a note for Barbara Wilson to say he entered that way as needed them urgently and had no key.
When housekeeper Jean Bouttell was shown the crime scene photo* by the police she commented that some items around the sink were not in their usual positions... bottles, plate-drying rack maybe?
The CT now claim that the jury were only shown the photo where the window catch appears to be set at 7 o'clock. The prosecution argued that JB exited that window and banged it to, but it looks like the latch didn't drop down to a fully-locked position, giving the impression that he might have been through it.
However, in 2011 the CT came across this other photo, taken they say, at the same time as the first which seems to show the catch fully-locked, and so favours the defence argument that the window was never used as an exit.
The photos have obviously been taken from different viewpoints - one near to the AGA, the other near to the (phone) worktop, but I think anyone can see that the curved shape of the handle creates an illusion that there is a difference in the catch positions, when in fact there isn't.
ETA: *of the Kitchen.