I am looking for a baby gate to put at the top of our staircase. I have three older children and am trying to avoid a bottom rail (U shaped frame) as I think it's a serious tripping hazard for the older children who all walk up and down without adult supervision. The opening is 104cm wide and I am happy to hardware mount or pressure mount. I also require it to be able to lock by simply pushing it shut. The three older children are able to do that, but not actively lock the gate after they have opened it.
I have looked in the local baby shops but can't find anything that meets my criteria. Is there anything out there?