Can anyone recommend some window catches that will work with our UPVC window frames?
We've just moved house and the windows in the new house are a nightmare in that they hinge at the top, don't lock and just have two handles that lift up at the bottom, at which point the whole window swings itself wide open. Even my mum was nearly pulled out of one while washing the windows and we have two kids under three! We badly need to put some safety catches on them so we can make sure the kids can't get them open, and so we can actually have them locked open a little if we ever get anything approaching a summer, but all the catches we've seen seem only to be suitable for wooden frames, or else don't work with the design of our windows.
Does anyone know where to get good window locks that work with plastic/upvc frames? At the moment I am just keeping them all firmly shut all the time and making sure there's nothing to stand on near any of them!