@wenslauw Of course the problem with that was the glass was very old and very brittle! My mum put her hand through one pane, and I put a cricket ball through another. 😂 The only thing you could do was replace them with like-for-like single-glazed panes, held in place with putty, because the trames couldn't hold anything thicker. And you weren't allowed to order new frames with thicker wooden structure for the fatter double-glazed panes.