May I ask if this has anything to do with the price of chips?
He was talking about the front door.
Ask Mr Horrocks whether he thought the front door was deadlocked. I neither know nor care about Mr Horrocks opinion on this point.
You told me he was talking about the front door. Well when you said either door. But I am questioning if it was possible to exit by the front door without knowing where the key was.
You were right SIL " If two people were involved, Madeleine could have been handed out of the window to the second person. If one, he could possibly have climbed out the window with her, but I believe it to be more likely that they left via the door leading to the car park. Although entry was gained via the patio doors, I do not believe this was the exit route as it is not only unnecessary and illogical, it would also substantially increase the chances of being seen."
Still unproven that the door could be opened from inside without the key.