I had never seen such a window either. Although had never checked
Bamber went searching for one in a big house. No surprise he found a window he could manipulate.
As with the 'last number dialled' portable phone, Julie's WS says he told her about the window.
I agree 100 per cent, he was upto something regarding the widows, we talk about not seeing a widow that would close from the outside, this was a old farmhouse with old windows and catches, held by screws that could loosen. How many of us have climbed in and out windows in their life’s never mind in the last six months. He had no need to use the windows and no excuse, he had a key and if June and Neville went out, they put a Key in the coal shed.