A friend has been broken into, the intruder forced something between the window frame and an opening window, wedged it up, then the window could be pulled open. The latches for this window are two, what look like bolt heads, which slide into slots (top and bott.) on the frame. Obviously there is enough play in the window frame to allow the window to be pulled open when it is bent up/out.
Has anyone ever tried to increase the security of these windows? I've looked at Screwfix's offerings, but there doesnt seem to be much choice, and I'm unsure as to what would be suitable. Thanks Alan.