Cold window problem

[WildThong]

In my front room there is an extra little window, non opening and arch shaped about 2.5ft by 1 ft. The problem is it is the original leaded single glaze so although there is no draught you can feel the cold seeping in. I cant afford to get it replaced but is there anything else I could do to it (apart from stuffing a pillow in it) to warm it up a bit?

WildThong, we get ice forming on the inside of our bedroom window I took a photo once but then the novelty wore off. I'd love to feel cold "seeping in".

A thick curtain should do the trick. Secondary glazing would work but might not look so good, especially if it's a feature window.

Thanks both. I did think of a curtain but I do like the look of it, as you say it's a feature. I suppose I'm putting looks over warmth which is daft.