Draughty French windows; what do I need?

[MissAligned]

I am sure we used to have some sort of floppy plastic strip which fitted into the groove between the 2 doors in our French windows.
And kept falling out.
And now appears to have vanished, and the wind is whistling through....

I am not sure what it is called to be able to replace it? Any help welcomed, thanks!

I think this may be called a gasket. Are your doors upvc? If so a local fitter or supplier should be able to fit a replacement for you.

Thank you for the reply. Am not sure I know whether the doors are Upvc or not; how do you tell?!

Upvc is very different from wood, it looks and feels plastic.
You can buy insulation strip on rolls of various thickness to stop draughts. We’ve got a couple of old upvc windows with gaps that we’ve put the strips in and they’ve stayed put and sealed the gaps.

youtube someone will of done a video

Thank you, I think the doors are wooden. Does this mean that the strip wouldn’t be suitable?

Woods fine if anything easier to sort you can tack and stick draught excluder strips to them look on screw fix website

Thank you