As I am struggling with UK-signalling, could someone inform me on the issue in general. And especially signalling on a single track route with passingplaces, and trains running in opposite directions. Which exact signals do I use where so that these trains can pass eachother (one should be waiting for the other on a passingplace). I am just a very little bit familair with feathers. And/or perhaps could someone mention a certain route which is showing the issue quite well ? Thank you.