Which Station has the steepest track gradient on UK heavy rail? And what's the steepest permissible track gradient for station in general. I've heard these are usually minimal, but I haven't been able to find many figures. A source tells me it's 1:260 under Grandfather rights and 1:400 for new stations. Reason why I'm asking as I'm creating something in Train Sim, the geography of the area is a bit tight, also the station was built pre 1900 so I'm more interested in Grandfather rights.