Thanks. The problem is the the screw hasn't fallen out. It's just loostened. So it's sticking out far enough to not let the window open. The only way I can see to solve this is to somehow remove the screw or screw it back in - but so far this seems impossible.
@crank39 Thanks for the suggestion. I've just given it a go. It seems both sides have a bit of movement, but kind of pivot on the centre, which still suggests to me that it's around the centre that it's jamming.
Hello,
My uPVC window has suddenly become jammed. The lock mechanisms seem to slide out of, and the window opens about half a cm, and then seems to jam in the centre area below the handle (where there are no locking mechanisims).
I have used an allen key and figured out that the locking...